Pioneer VSX-520-K, VSX-820-K Service manual

2010

VSX-820-K

For details, refer to "Important Check Points for good servicing".

AUDIO/VIDEO MULTI-CHANNEL RECEIVER

VSX-820-K

VSX-520-K

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).

Model Type Power Requirement Remarks

VSX-820-K CUXCNSM AC 120 V

VSX-520-K CUXCNSM AC 120 V

ORDER NO.

RRV4043

PIONEER CORPORATION 1-1, Shin-ogura, Saiwai-ku, Kawasaki-shi, Kanagawa 212-0031, Japan

PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936

PIONEER CORPORATION

K-IZK MAR.

2010 Printed in Japan

1

1. SAFETY PRECAUTIONS

The following check should be performed for the
continued protection of the customer and service
technician.

LEAKAGE CURRENT CHECK

Measure leakage current to a known earth ground
(water pipe, conduit, etc.) by connecting a leakage
current tester such as Simpson Model 229-2 or
equivalent between the earth ground and all exposed
metal parts of the appliance (input/output terminals,
screwheads, metal overlays, control shaft, etc.). Plug
the AC line cord of the appliance directly into a 120V
AC 60 Hz outlet and turn the AC power switch on. Any
current measured must not exceed 0.5 mA.

ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL
SHOCK HAZARD AND MUST BE CORRECTED BEFORE
RETURNING THE APPLIANCE TO THE CUSTOMER.

2. PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the appliance

have special safety related characteristics. These are
often not evident from visual inspection nor the protection
afforded by them necessarily can be obtained by using
replacement components rated for voltage, wattage, etc.
Replacement parts which have these special safety
characteristics are identified in this Service Manual.
Electrical components having such features are
identified by marking with a > on the schematics and on
the parts list in this Service Manual.
The use of a substitute replacement component which
does not have the same safety characteristics as the
PIONEER recommended replacement one, shown in the
parts list in this Service Manual, may create shock, fire,
or other hazards.
Product Safety is continuously under review and new
instructions are issued from time to time. For the latest
information, always consult the current PIONEER Service
Manual. A subscription to, or additional copies of,
PIONEER Service Manual may be obtained at a nominal
charge from PIONEER.

Leakage
current
tester

Reading should
not be above

0.5 mA

Device
under
test

Test all
exposed metal
surfaces

Also test with
plug reversed
(Using AC adapter
plug as required)

Earth
ground

AC Leakage Test

(FOR USA MODEL ONLY)

WARNING

This product may contain a chemical known to the State of California to cause cancer, or birth defects or other reproductive
harm.

Health & Safety Code Section 25249.6 - Proposition 65

NOTICE
(FOR CANADIAN MODEL ONLY )
Fuse symbols (fast operating fuse) and/or (slow operating fuse) on PCB indicate that replacement parts must
be of identical designation.

REMARQUE
(POUR MODÈLE CANADIEN SEULEMENT)
Les symboles de fusible (fusible de type rapide) et/ou (fusible de type lent) sur CCI indiquent que les pièces
de remplacement doivent avoir la même désignation.

This service manual is intended for qualified service technicians ; it is not meant for the casual do-it­yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained
to properly and safely repair complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may
void the warranty. If you are not qualified to perform the repair of this product properly and safely, you
should not risk trying to do so and refer the repair to a qualified service technician.

2 3 4

SAFETY INFORMATION

A

B

C

D

E

F

2

1

2 3 4

VSX-820-K

5

[Important Check Points for Good Servicing]

In this manual, procedures that must be performed during repairs are marked with the below symbol.
Please be sure to confirm and follow these procedures.

1. Product safety

Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by
following the safety instructions described in this manual.

1 Use specified parts for repair.

Use genuine parts. Be sure to use important parts for safety.

2 Do not perform modifications without proper instructions.

Please follow the specified safety methods when modification(addition/change of parts) is required due to interferences such as
radio/TV interference and foreign noise.

3 Make sure the soldering of repaired locations is properly performed.

When you solder while repairing, please be sure that there are no cold solder and other debris.
Soldering should be finished with the proper quantity. (Refer to the example)

4 Make sure the screws are tightly fastened.

Please be sure that all screws are fastened, and that there are no loose screws.

5 Make sure each connectors are correctly inserted.

Please be sure that all connectors are inserted, and that there are no imperfect insertion.

6 Make sure the wiring cables are set to their original state.

Please replace the wiring and cables to the original state after repairs.
In addition, be sure that there are no pinched wires, etc.

7 Make sure screws and soldering scraps do not remain inside the product.

Please check that neither solder debris nor screws remain inside the product.

8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the power cord.

Damaged power cords may lead to fire accidents, so please be sure that there are no damages.
If you find a damaged power cord, please exchange it with a suitable one.

9 There should be no spark traces or similar marks on the power plug.

When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure
connections and suitable usage. Please exchange the power cord if necessary.

a Safe environment should be secured during servicing.

When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. in order to prevent injuries.
Please pay attention to your surroundings and repair safely.

2. Adjustments

To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification.
Adjustments should be performed in accordance with the procedures/instructions described in this manual.

4. Cleaning

For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper
cleaning should be performed to restore their performances.

3. Lubricants, Glues, and Replacement parts

Use grease and adhesives that are equal to the specified substance.
Make sure the proper amount is applied.

5. Shipping mode and Shipping screws

To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be
installed before shipment. Please be sure to follow this method especially if it is specified in this manual.

6 7 8

A

B

C

D

5

VSX-820-K

6 7 8

E

F

3

1

2 3 4

CONTENTS

SAFETY INFORMATION ..........................................................................................................................................................2

1. SERVICE PRECAUTIONS ....................................................................................................................................................5

A

B

C

D

E

1.1 NOTES ON SOLDERING ...............................................................................................................................................5

1.2 CAUTION........................................................................................................................................................................5

2. SPECIFICATIONS .................................................................................................................................................................6

2.1 SPECIFICATIONS...........................................................................................................................................................6

2.2 PANEL FACILITIES .........................................................................................................................................................8

3. BASIC ITEMS FOR SERVICE.............................................................................................................................................16

3.1 CHECK POINTS AFTER SERVICING..........................................................................................................................16

3.2 PCB LOCATIONS .........................................................................................................................................................17

3.3 JIGS LIST......................................................................................................................................................................19

4. BLOCK DIAGRAM...............................................................................................................................................................20

4.1 OVERALL WIRING DIAGRAM......................................................................................................................................20

4.2 OVERALL BLOCK DIAGRAM.......................................................................................................................................22

4.3 POWER SUPPLY and MAIN UCOM BLOCK DIAGRAM..............................................................................................24

5. DIAGNOSIS.........................................................................................................................................................................26

5.1 DIAGNOSIS FLOWCHART...........................................................................................................................................26

5.2 ADAPTER ERROR MESSAGE.....................................................................................................................................42

5.3 DETECTION CIRCUIT..................................................................................................................................................43

6. SERVICE MODE .................................................................................................................................................................46

6.1 SERVICE MODE...........................................................................................................................................................46

7. DISASSEMBLY....................................................................................................................................................................49

8. EACH SETTING AND ADJUSTMENT ................................................................................................................................59

8.1 HOW TO UPDATE FIRMWARE ....................................................................................................................................59

IDLE CURRENT ADJUSTMENT ..................................................................................................................................62

8.2

9. EXPLODED VIEWS AND PARTS LIST...............................................................................................................................64

9.1 PACKING SECTION......................................................................................................................................................64

9.2 EXTERIOR SECTION (VSX-820-K) .............................................................................................................................66

9.3 EXTERIOR SECTION (VSX-520-K) .............................................................................................................................70

10. SCHEMATIC DIAGRAM ....................................................................................................................................................74

10.1 INPUT ASSY...............................................................................................................................................................74

10.2 AMP ASSY..................................................................................................................................................................76

10.3 SPEAKER, HEADPHONE and MIC ASSYS...............................................................................................................78

10.4 PORTABLE, PT, HP_GUIDE, CNT1, CNT2, GUIDE_L and GUIDE_R ASSYS..........................................................79

10.5 VIDEO ASSY ..............................................................................................................................................................80

10.6 F-VIDEO, FRONT and FUNCTION ASSYS................................................................................................................82

10.7 MAIN and REG ASSYS ..............................................................................................................................................84

10.8 HDMI ASSY ................................................................................................................................................................86

10.9 DSP

ASSY (1/2)..........................................................................................................................................................88

10.10 DSP ASSY (2/2)........................................................................................................................................................90

10.11 USB ASSY (VSX-820-K ONLY).................................................................................................................................92

10.12 BT ASSY...................................................................................................................................................................94

11. PCB CONNECTION DIAGRAM ........................................................................................................................................95

11.1 INPUT ASSY...............................................................................................................................................................96

11.2 AMP ASSY..................................................................................................................................................................98

11.3 SPEAKER, HEADPHONE, MIC and PORTABLE ASSYS ........................................................................................100

11.4 PT, HP_GUIDE, CNT1, CNT2, GUIDE_L and GUIDE_R ASSYS ............................................................................102

11.5 VIDEO ASSY ............................................................................................................................................................104

11.6 F-VIDEO, FRONT and FNCTION ASSYS ................................................................................................................106

11.7 MAIN and REG ASSYS ............................................................................................................................................110

11.8 HDMI ASSY ..............................................................................................................................................................114

11.9 DSP

ASSY ................................................................................................................................................................116

11.10 USB ASSY (VSX-820-K ONLY)...............................................................................................................................118

11.11 BT ASSY.................................................................................................................................................................120

12. PCB PARTS LIST ............................................................................................................................................................121

F

4

1

2 3 4

VSX-820-K

5

• For environmental protection, lead-free solder is used on the printed circuit boards mounted in this unit.
Be sure to use lead-free solder and a soldering iron that can meet specifications for use with lead-free solders for repairs
accompanied by reworking of soldering.

• Compared with conventional eutectic solders, lead-free solders have higher melting points, by approximately 40 ºC.
Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373 ºC in general, although
the temperature depends on the heat capacity of the PC board on which reworking is required and the weight of the tip of
the soldering iron.

Do NOT use a soldering iron whose tip temperature cannot be controlled.

Compared with eutectic solders, lead-free solders have higher bond strengths but slower wetting times and higher melting
temperatures (hard to melt/easy to harden).

The following lead-free solders are available as service parts:

• Parts numbers of lead-free solder:
GYP1006 1.0 in dia.
GYP1007 0.6 in dia.
GYP1008 0.3 in dia.

• Discharging

For more detail, please refer to “7. DISASSEMBLY - 1. Discharging”.

• Notes on Ground Points Connection

For more detail, please refer to “7. DISASSEMBLY - 2. Notes on Ground Points Connection”.

6 7 8

1. SERVICE PRECAUTIONS

1.1 NOTES ON SOLDERING

A

B

1.2 CAUTION

C

D

E

5

VSX-820-K

6 7 8

F

5

1

iPod cable
(L308102013010-IL)

Accessories

Remote control
(8300758300010-IL)

AM loop antenna
(E601016000010-IL)

FM wire antenna
(E605010070001-IL)

Dry cell batteries
(AAA size IEC R03) x2

Microphone (for Auto MCACC setup)
(M040000300200-IL)

2. SPECIFICATIONS

2.1 SPECIFICATIONS

2.1.1 VSX-820-K

A

B

2 3 4

C

D

E

F

6

1

2 3 4

VSX-820-K

5

Accessories

Remote control
(8300758600010-IL)

AM loop antenna
(E601016000010-IL)

FM wire antenna
(E605010070001-IL)

Dry cell batteries
(AAA size IEC R03) x2

2.1.2 VSX-520-K

6 7 8

A

B

C

D

E

5

6 7 8

VSX-820-K

F

7

1

Front panel

2.2 PANEL FACILITIES

2.2.1 VSX-820-K

A

B

2 3 4

C

D

E

F

8

1

2 3 4

VSX-820-K

Display

5

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

9

1

Remote control

A

B

2 3 4

C

D

E

F

10

1

2 3 4

VSX-820-K

5

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

11

2.2.2 VSX-520-K

Front panel

A

B

1

2 3 4

C

D

E

F

12

1

2 3 4

VSX-820-K

Display

5

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

13

1

Remote control

A

B

2 3 4

C

D

E

F

14

1

2 3 4

VSX-820-K

5

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

15

1

Item to be checked regarding video Item to be checked regarding audio

Block noise Distortion
Horizontal noise Noise
Flicker Volume too low
Disturbed image (video jumpiness) Volume too high
Too dark Volume fluctuating
Too bright Sound interrupted
Mottled color

No. Procedures Check points

1

2

3

4

5

6

7

8

Confirm whether the customer complain has been solved.
If the customer complain occurs with the particular source,
such as Dolby Digital, DTS, AAC, DVD-A and HDMI, input it for
the operation check.

The customer complain must not be reappeared.
Video, Audio and operations must be normal.

Check the analog audio playback.
(Make the analog connections with a DVD player.)

Each channel audio and operations must be normal.

Check the digital audio playback.
(Make the digital connections with a DVD player.)

Each channel audio and operations must be normal.

Check surround playback.
(Select Surround mode and check the multichannel operations
via the DSP circuit.)

Each channel audio and operations must be normal.

Check the tuner (AM and FM) operations. Audio and operations must be normal.

Check the video outputs.
(Connect with a DVD player.)

Video and operations must be normal.

Check the sound from headphone output. Sound must be normal, without noise.

Check the appearance of the product. No scratches or dirt on its appearance after receiving it for

service.

Items to be checked after servicing / VSX, SC

To keep the product quality after servicing, confirm recommended check points shown below.

See the table below for the items to be checked regarding video and audio.

2 3 4

3. BASIC ITEMS FOR SERVICE

3.1 CHECK POINTS AFTER SERVICING

A

B

C

D

E

F

16

1

2 3 4

VSX-820-K

5

NSP 1..MAIN ASSY 7025HK0916010-IL

2..MAIN ASSY 7028069111010-IL

2..PT ASSY 7028069112010-IL

2..CNT2 ASSY 7028069113010-IL

2..HEADPHONE ASSY 7028069114010-IL

2..HP_GUIDE ASSY 7028069115010-IL

2..MIC ASSY 7028069116010-IL

2..GUIDE_L ASSY 7028069117010-IL

2..GUIDE_R ASSY 7028069118010-IL

2..CNT1 ASSY 7028069119010-IL

NSP 1..VIDEO ASSY 7025HK0916013-IL

2..VIDEO ASSY 7028069141010-IL

NSP 1..FRONT ASSY 7025HK0916011-IL

2..FRONT ASSY 7028069121010-IL

2..FUNCTION ASSY 7028069122010-IL

2..F-VIDEO ASSY 7028069123010-IL

NSP 1..INPUT ASSY 7025HK0916012-IL

2..INPUT ASSY 7028069131010-IL

NSP 1..SPEAKER ASSY 7025HK0916014-IL

2..SPEAKER ASSY 7028069151010-IL

NSP 1..DSP ASSY 7025HK0916015-IL

2..DSP ASSY 7028069161010-IL

2..REG ASSY 7028069162010-IL

NSP 1..HDMI ASSY 7025HK0916018-IL

2..HDMI ASSY 7028069191010-IL

NSP 1..USB ASSY 7025HK0916016-IL

2..USB ASSY 7028069171010-IL

NSP 1..BT ASSY 7025HK0916017-IL

2..BT ASSY 7028069181010-IL

NSP 1..AMP ASSY 7025HK0916019-IL

2..AMP ASSY 7028067523010-IL

Mark No. Description Part No. Mark No. Description Part No.

LIST OF ASSEMBLIES

NOTES: - Parts marked by “NSP” are generally unavailable because they are not in our Master Spare Parts List.

-

The > mark found on some component parts indicates the importance of the safety factor of the part.

Therefore, when replacing, be sure to use parts of identical designation.

O

FRONT ASSY USB ASSY

U

R

REG ASSY

L

GUIDE_R ASSY

I

CNT1 ASSY

T

DSP ASSY

A

INPUT ASSY

S

HDMI ASSY

N

F-VIDEO ASSY

B

AMP ASSY

E

MIC ASSY

G

PT ASSY

P

FUNCTION ASSY

K

GUIDE_L ASSY

D

HEADPHONE ASSY

H

HP_GUIDE ASSY

M

VIDEO ASSY

Q

MAIN ASSY

J

CNT2 ASSYBT ASSY

VC

SPEAKER ASSY

3.2 PCB LOCATIONS

3.2.1 VSX-820-K

6 7 8

A

B

C

5

6 7 8

VSX-820-K

D

E

F

17

1

NSP 1..MAIN ASSY 7025HK0915010-IL

2..MAIN ASSY 7028069111060-IL

2..PT ASSY 7028069112010-IL

2..CNT2 ASSY 7028069113010-IL

2..HEADPHONE ASSY 7028069114010-IL

2..HP_GUIDE ASSY 7028069115010-IL

2..GUIDE_L ASSY 7028069117010-IL

2..GUIDE_R ASSY 7028069118010-IL

2..CNT1 ASSY 7028069119010-IL

2..PORTABLE ASSY 702806911A010-IL

NSP 1..VIDEO ASSY 7025HK0915013-IL

2..VIDEO ASSY 7028069141040-IL

NSP 1..FRONT ASSY 7025HK0915011-IL

2..FRONT ASSY 7028069121020-IL

2..FUNCTION ASSY 7028069122010-IL

NSP 1..INPUT ASSY 7025HK0915012-IL

2..INPUT ASSY 7028069131020-IL

NSP 1..SPEAKER ASSY 7025HK0915014-IL

2..SPEAKER ASSY 7028069151030-IL

NSP 1..DSP ASSY 7025HK0915015-IL

2..DSP ASSY 7028069161020-IL

2..REG ASSY 7028069162010-IL

NSP 1..HDMI ASSY 7025HK0915016-IL

2..HDMI ASSY 7028069191020-IL

NSP 1..BT ASSY 7025HK0916017-IL

2..BT ASSY 7028069181010-IL

NSP 1..AMP ASSY 7025HK0916019-IL

2..AMP ASSY 7028067523010-IL

Mark No. Description Part No. Mark No. Description Part No.

LIST OF ASSEMBLIES

NOTES: - Parts marked by “NSP” are generally unavailable because they are not in our Master Spare Parts List.

-

The > mark found on some component parts indicates the importance of the safety factor of the part.

Therefore, when replacing, be sure to use parts of identical designation.

FRONT ASSY

R

REG ASSY

L

GUIDE_R ASSY

I

CNT1 ASSY

T

DSP ASSY

A

INPUT ASSY

S

HDMI ASSY

B

AMP ASSY

F

PORTABLE ASSY

G

PT ASSY

P

FUNCTION ASSY

K

GUIDE_L ASSY

D

HEADPHONE ASSY

H

HP_GUIDE ASSY

M

VIDEO ASSY

Q

MAIN ASSY

J

CNT2 ASSYBT ASSY

VC

SPEAKER ASSY

O

3.2.2 VSX-520-K

A

2 3 4

B

C

D

E

F

18

1

2 3 4

VSX-820-K

5

Jigs List

Jig Name Part No. Remarks

RS-232C update jig GGF1642

Firmware update (RS-232C ↔ Rear panel)

10P to 8P FFC GGD1676

Board to board extension jig cable GGD1673 Diagnosis (DSP Assy ↔ MAIN Assy)

10P extension jig cable GGD1628 Diagnosis (AMP Assy ↔ INPUT Assy)
8P extension jig cable GGD1629 Diagnosis (AMP Assy ↔ MAIN Assy)

Lubricants and Glues List

Name Part No. Remarks

Silicon grease GEM1057 Refer to “9.2 EXTERIOR SECTION (VSX-820-K)”

and “9.3 EXTERIOR SECTION (VSX-520-K)”.

Silicon adhesive GYA1011 (KE40RTV-W) Refer to “9.2 EXTERIOR SECTION (VSX-820-K)”

and “9.3 EXTERIOR SECTION (VSX-520-K)”.

6 7 8

3.3 JIGS LIST

A

B

C

D

E

F

VSX-820-K

5

6 7 8

19

1

Q

MAIN ASSY
(7028069111010-IL: VSX-820-K)
(7028069111060-IL: VSX-520-K)

B

AMP ASSY
(7028067523010-IL)

C

SPEAKER ASSY
(7028069151010-IL: VSX-820-K)
(7028069151030-IL: VSX-520-K)

H
(

M

VIDEO ASSY
(7028069141010-IL: VSX-820-K)
(7028069141040-IL: VSX-520-K)

A

INPUT ASSY
(7028069131010-IL:
VSX-820-K)
(7028069131020-IL:
VSX-520-K)

I

CNT1 ASSY
(7028069119010-IL)

H

G

HP_GUIDE ASSY
(7028069115010-IL)

PT ASSY
(7028069112010-IL)

CN1001

N

F-VIDEO ASSY
(7028069123010-IL)

CN701

VSX-820-K ONLY

VS

VSX-520-K ONLY

VSX-820-K
ONLY

VSX-820-K

ONLY

1,2,3 PIN
4,5 PIN

CN1002

CN807

CP804

CP802

CN707

CP805

CN121B

CN121A

CN803

CN806

CP122

CP123

CP110

CP117

CP118

CP125

CN201

CP126

CN202

C

CP109CP301CN106

AC CORD
OR INLET

F

CP120

CP121

V

BT ASSY
(7028069181010-IL)

E

MIC ASSY
(7028069116010-IL)

CN502

CP801

CP502

CP501

CN501

CN601

CP128

CP107

CN202

CP203 CN401

CP404

CN201

CP403CP405

CN104

CP402

CN103

CN703

F

PORTABLE ASSY
(702806911A010-IL)

2 3 4

4. BLOCK DIAGRAM

4.1 OVERALL WIRING DIAGRAM

A

B

C

D

E

F

20

1

2 3 4

VSX-820-K

5

-

When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST".

-

The > mark found on some component parts indicates the importance of the safety factor of the part.

Therefore, when replacing, be sure to use parts of identical designation.

-

: The power supply is shown with the marked box.

D

HEADPHONE ASSY
(7028069114010-IL)

S

HDMI ASSY
(7028069191010-IL:
VSX-820-K)
(7028069191020-IL:
VSX-520-K)

J

CNT2 ASSY
(7028069113010-IL)

VSX-820-K ONLY

VSX-820-K

ONLY

CN702

CN701

CP111

CP112

CP114

CP115

CN202

CP116

CP105

CN204

CP704

CN706

CP702

CN203

CP200 CN200

CN205

CP105

UPGRADE

CP703

CN703A

R

REG ASSY
(7028069162010-IL)

O

FRONT ASSY
(7028069121010-IL: VSX-820-K)
(7028069121020-IL: VSX-520-K)

P

FUNCTION ASSY
(7028069122010-IL)

U

USB ASSY
(7028069171010-IL)

K

GUIDE_L ASSY
(7028069117010-IL)

L

GUIDE_R ASSY
(7028069118010-IL)

CN207B

CP303

CP101

CP102CP109

CP301

FPC101

CN207A

CN702

CP703

CN802

CP802

CN807

CN805

POWER

TRANSFORMER

DSP ASSY
(7028069161010-IL:
VSX-820-K)
(7028069161020-IL:
VSX-520-K)

T

T T

1/2, 2/2

6 7 8

A

B

C

D

E

5

VSX-820-K

6 7 8

F

21

1

INPUT ASSY

BD
(VSX-820-K ONLY)

HDMI OUT

DVD(VSX-820-K)
BD(VSX-520-K)

TV/SAT(VSX-820-K)
DVD(VSX-520-K)

DVR/VCR(VSX-820-K)
TV/SAT(VSX-520-K)

73

76
67

71
69

84
82

72

75
66

70
68

64

85

83
81

65

59
63
61
79

58
62
60
78

F_AUX R

86

F_AUX L

T

INPUT ASSY

INPUT ASSY

INPUT ASSY

MAIN ASSY

MAIN ASSY

S

HDMI ASSY

U

USB
ASSY

Q

MAIN ASSY

E

MIC ASSY

DSP ASSY

V

BT ASSY

VSX-820-K
ONLY

VSX-820-K
ONLY

VSX-820-K
ONLY

VSX-520-K ONLY

F

PORTABLE ASSY

VSX-820-K
ONLY

4.2 OVERALL BLOCK DIAGRAM

A

B

C

2 3 4

D

E

F

22

1

VSX-820-K

2 3 4

D

HEADPHONE ASSY

C

SPEAKER
ASSY

G

PT ASSY

M

VIDEO ASSY

A

INPUT ASSY

MAIN ASSY

MAIN ASSY

INPUT

ASSY

VIDEO

ASSY

SPEAKER

ASSY

B

AMP ASSY

O

FRONT ASSY

N

F-VIDEO ASSY

The > mark found on some component parts
indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts
of identical designation.

VSX-820-K
ONLY

VSX-820-K
ONLY

VSX-520-K
ONLY

VSX-820-K
ONLY

VSX-820-K ONLY

5

6 7 8

A

B

C

D

E

VSX-820-K

5

6 7 8

F

23

1

S4(FLT)

S3(DSP, HDMI)

AC CORD

S2(+12V,-12V)

S1(AMP B+/B-)

S4(DIR/CODEC, HDMI, USB)

MAIN TRANS

SUB TRANS

R

REG
ASSY

Q

MAIN ASSY

VSX-820-K
ONLY

2 3 4

4.3 POWER SUPPLY and MAIN UCOM BLOCK DIAGRAM

A

B

C

D

E

F

24

1

2 3 4

VSX-820-K

5

R

REG
ASSY

The > mark found on some component parts
indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts
of identical designation.

INPUT ASSY

VSX-820-K ONLY

VSX-820-K ONLY

6 7 8

A

B

C

D

E

F

5

6 7 8

VSX-820-K

25

1

Step 3: Regulator IC

REG101, REG102 (Pin 3)

Is the

voltage of around

3.3 V input?

Replace REG103.

Check the ZD200 2.4 VB
and IC106.

To Step 3

To Step 4

Step 0: Preliminary confirmation

Confirm the following items before checking

Tighten screws securely.

No

Ye s

To Step 1

No

[1] DSP TROUBLESHOOTING

Step 2: Regulator IC

Check the REG101,
REG102 and MAIN Assy

Check the REG103 and
MAIN Assy.

REG103 (Pin 3)

Is the

voltage of around

5 V input?

No

Ye s

(to chassis)

ZD200 cathode

Is the

voltage of 2.5 V

output?

No

*The I/O power of DSP Assy is OK.

*The IC106 power of DSP Assy

*The DSP IC CORE power of DSP Assy

XMCK

Note: REG101, REG102 is made of
parallel connection.

REG103 (Pin 2)

Is the

voltage of 3.3 V

output?

No

Ye s

Ye s

Ye s

Is the

voltage of 1.2 V

output?

Replace REG101 and REG102.

Check the path to XTAL101.

No

Ye s

(to chassis)

(to chassis)

REG101, REG102 (Pin 2)

(to chassis)

Step 1: BtoB connector, wire

CN200,CN202,CN203,

CN204,CP105

Are the

connectors securely

inserted?

Turn the power off and
insert the connectors
securely.

No

Ye s

To Step 2

*CP105 connectors doesn't connection
in case of DSP JIG B'D use.

BtoB connector, wire

Do screws of COAX

Jack securely tighten?

OR connect GND wire of

DSP JIG B'D to chassis.

Step 4: X'tal

To Step 5

Ye s

IC109 (Pin 6, 7)

No

Is there

a 24.576 MHz

output?

Check the path to pins 6, 7 of IC109.
Replace XTAL101.

Ye s

IC102 (Pin 17)

No

Is there

a 24.576 MHz

input?

5. DIAGNOSIS

5.1 DIAGNOSIS FLOWCHART

A

2 3 4

B

C

D

E

F

26

1

VSX-820-K

2 3 4

5

Replace IC109.

Ye s

IC109 (Pin 15)

DIR_BCK (Bit clock)

No

Is there

a bit clock

output?

(0 V ⇔ 3.3 V)

Ye s

IC106 (Pin 4)

DAI_MCK (Master clock)

Is there

a master clock

output?

(0 V ⇔ 2.5 V)

Ye s

IC106 (Pin 7)

DAI_LRCK (LR clock)

Is there

a LR clock

output?

(0 V ⇔ 2.5 V)

Ye s

IC106 (Pin 9)

DAI_BCK (Bit clock)

*IC106 Pin 1
0 V : DIR

3.3 V : HDMI

Is there

a bit clock

output?

(0 V ⇔ 2.5 V)

Replace IC106.

Check the path
between IC106-pin 1
and MAIN Assy.

No

No

No

No

Is the

voltage of

IC106-pin 1

0 V?

Ye s

Switch

Step 5: DIR

Check the path to pins 10-13
of IC110 or replace IC110.

Check the path to CP105 connector.

Replace IC109.

Check the path to OUTPUT PIN of
JACK105, JACK106.

IC110 (Pins 3, 5)

OPTICAL (Pin 3: OPT2, Pin 5: OPT1)

Check that the S/PDIF signal is output.
Check that changes by pulling out and inserting the digital input lines.

Can

observe the

digital signal

?

No

(0 V ⇔ 3.3 V)

Ye s

IC109 (Pin 67)

COAX

Can

observe the

digital signal

?

No

Ye s

Ye s

Check that the data and clock signals are output.

Check that it changes in the Playback and Pause modes of
the USB (iPod).

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

Ye s

IC109 (Pin 71)

From USB Assy

Can

observe the

digital signal

?

No

VSX-820-K ONLY

(0 V ⇔ 3.3 V)

Check the path to pins 4, 6 of
IC110 or replace IC110.

IC109 (Pins 61, 63)

OPTICAL (Pin 61: OPT2, Pin 63: OPT1)

Can

observe the

digital signal

?

No

Ye s

(0 V ⇔ 3.3 V)

Check the MAIN Assy.

IC109 (Pin 10)

DIR_MCK (Master clock)

No

No

Ye s

Is there

a master clock

output?

IC109 (Pin 16)

DIR_LRCK (LR clock)

No

Is there

a LR clock

output?

Replace IC109.

(0 V ⇔ 3.3 V)

Ye s

IC109 (Pin 14)

DIR_SDTO (Data)

No

Is there

a data

output?

Is the

voltage of PDN

IC109-pin 31

3.3 V?

Check the USB Assy.

No

To Step 6

6 7 8

A

B

C

D

5

VSX-820-K

6 7 8

E

F

27

1

Step 6: DSP output (digital)

Ye s

Digital output of each CH when inputting the digital signal with audio.

IC109 (Pin 26)

Center/LFE data

No

Is there

a data input?

Ye s

Check the path between IC102
and data & address lines.
SDRAM (IC100), FLASH ROM
(IC101)

IC109 (Pin 25)

Surround back L/R data

No

Is there

a data input?

Ye s

IC109 (Pin 27)

Surround L/R data

No

Is there

a data input?

Ye s

IC109 (Pin 18)

DSP_BCK (Bit clock)

No

Is there

a bit clock

input?

Ye s

IC109 (Pin 19)

DSP_LRCK (LR clock)

No

Is there

a LR clock

output?

Ye s

IC109 (Pin 28)

Front L/R data

No

Is there

a data input?

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

To Step 7

A

2 3 4

B

C

D

E

F

28

1

VSX-820-K

2 3 4

5

Ye s

Replace IC109.

IC109 (Pin 49)

Front R out

No

Is the output

2.5 V fixing?

Replace IC109.

Ye s

Ye s

IC109 (Pin 43)

Surround L out

No

Is the output

2.5 V fixing?

Replace IC109.

IC109 (Pin 41)

Center out

No

Is the output

2.5 V fixing?

Ye s

Replace IC109.

IC109 (Pin 39)

End

LFE out

No

Is the output

2.5 V fixing?

Ye s

Ye s

Replace IC109.

IC109 (Pin 47)

Front L out

No

Is the output

2.5 V fixing?

Replace IC109.

IC109 (Pin 45)

Surround R out

No

Is the output

2.5 V fixing?

Analog output of each CH when inputting the digital
signal (-∞ dB (no signal)).

Replace IC109.

Ye s

IC109 (Pin 43)

Surround L out

No

Is there

a audio signal

output?

Replace IC109.

Ye s

IC109 (Pin 41)

Center out

No

Is there

a audio signal

output?

Replace IC109.

Ye s

IC109 (Pin 39)

LFE out

No

Is there

a audio signal

output?

Step 7: Codec output (analog)

Analog output of each CH when inputting the digital signal with audio.

Replace IC109.

Ye s

IC109 (Pin 49)

Front R out

No

Is there

a audio signal

output?

Replace IC109.

Ye s

IC109 (Pin 47)

Front L out

No

Is there

a audio signal

output?

Replace IC109.

Ye s

IC109 (Pin 45)

Surround R out

No

Is there

a audio signal

output?

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

29

1

1. Causes for noncompletion of HDMI authentication between the source equipment and this unit
(the HDMI indicator is unlit or flashes)

[2] HDMI TROUBLESHOOTING

Causes for no display or sound from the monitor

HDMI Simple Diagnosis

Replace the HDMI cable.

NG

OK

OK

OK

Connect the source equipment
(player) to the Sink equipment
(monitor) directly.

Replace the Player.

Replace the HDMI cable.

Repare the Receiver.

Repare the Player.

NG

OK

Replace the Monitor.

Repare the Monitor.

NG

POWER ON

Confirm the following items before checking

Do

screws of COAX

jack securely

tighten?

Tighten screws securely.

No

Ye s

Source equipment:
Connect a DVD player to BD or DVD or TV or DVR.

To Step 2

To Step 1

Sink equipment:
Connect a TV to HDMI OUT.

Turn on the power of the Receiver and equipments
which was connected with HDMI.

Function switch (BD or DVD or TV or DVR)

Switch the function that HDMI was assigned.
Factory shipments setting:
For VSX-820-K
HDMI 1: BD
HDMI 2: DVD
HDMI 3: TV/SAT
HDMI 4: DVR/VCR

For VSX-520-K
HDMI 1: BD
HDMI 2: DVD
HDMI 3: TV/SAT

HDMI Troubleshooting

Step 0: Preliminary confirmation

Step 1: Connect the HDMI equipment

A

2 3 4

B

C

D

E

F

30

1

2 3 4

VSX-820-K

CN701 (Pin 1)

Is the voltage

0 to 3.3 V?

No

SUB_ON

Diagnose the MAIN Assy.

Diagnose the MAIN Assy.

Diagnose the MAIN Assy.

Diagnose the MAIN Assy.

Ye s

CN701 (Pin 9)

Is the voltage

3.3 V?

Is the voltage

3.3 V?

Is the voltage

3.3 V?

Is the voltage

5 V?

No

SUB MICOM 3.3V

Q711 (collector)

No

SUB MICOM 3.3V

Ye s

Ye s

CN701 (Pin 12)

No

HDMI_5V

Ye s

CN701 (Pins 13, 14)

No

HDMI_3.3V

Ye s

Is Q711

base voltage

2.6 V?

No

Ye s

To Step 3

Is the voltage

3.3 V?

Is the voltage

1.8 V?

Is the voltage

3.3 V?

Is the voltage

1.2 V?

Replace
IC704.

Replace
IC701.

IC704 (Pin 3)

No

HDMI 3.3V

Ye s

IC704 (Pin 2)

No

HDMI 1.8V

Ye s

Check the parts and patterns in
the path.

Check the parts and patterns in
the path.

Is IC704

abnormally

hot?

Is IC701

abnormally

hot?

No

Ye s

IC701 (Pin 3)

No

HDMI 3.3V

HDMI 1.2V

Ye s

The output and GND may be short-circuited.
Check the path between them.

Check the parts and
patterns in the path.
Replace Q711,
IC706, etc.

Check the parts and
patterns in the path
Q711, Q714, etc.

The output and GND may be short-circuited.
Check the path between them.

IC701 (Pin 2)

No

Ye s

No

Ye s

Step 2: Power supply

Replace Q714.

No

Ye s

Is Q714

collector voltage

0 V? (base is 3.3 V)

5

6 7 8

A

B

C

D

5

VSX-820-K

6 7 8

E

F

31

1

To Step 5

Step 4: X'TAL

Replace IC706 or X702.

Replace IC703 or X701.

Is there

a 12 MHz

output?

Is there

a 12 MHz

output?

Is there

a 27 MHz

output?

Is there

a 27 MHz

output?

IC706 (Pin 15)

No

Ye s

IC706 (Pin 13)

No

Ye s

Check the path to pin13 of IC706.
Replace IC706.

IC703 (Pin 5)

No

Ye s

IC703 (Pin 4)

No

Ye s

Check the path to pin4 of IC703.
Replace IC703.

To Step 4

Check the parts and patterns in
the path of pin 87 of IC706.

Is the voltage

0 to 3.3 V?

Is there a data

0 to 3.3 V?

IC703 (Pin 21)

No

HR_RST

Ye s

IC702 (Pin 25)

No

Ye s

Check the parts and patterns in
the path of pin 89 of IC706.

Step 3: Diagnosis

CN701 (Pin 5)

Is the voltage

0 to 3.3 V?

No

SUB_RESET

Diagnose the MAIN Assy.

Diagnose the MAIN Assy.

Diagnose the MAIN Assy.

Diagnose the MAIN Assy.

Diagnose the MAIN Assy.

Ye s

CN701 (Pin 4)

Is the voltage

0 to 3.3 V?

No

SUB_PDN

CN701 (Pin 8)

Is there

a data input?

(0 to 3.3 V)

Is there

a data input?

(0 to 3.3 V)

No

CSCK_MAIN

Ye s

Ye s

CN701 (Pin 3)

Is there

a data input?

(0 to 3.3 V)

No

MAIN_IRQ

Ye s

CN701 (Pin 2)

Is there

a data output?

(0 to 3.3 V)

Is there

a data output?

(0 to 3.3 V)

No

SUB_IRQ

Check the parts and patterns in
the path of IC706.

Ye s

CN701 (Pin 7)

No

SCDO_MAIN

Ye s

CN701 (Pin 6)

No

SCDI_MAIN

Ye s

Check the parts and patterns in
the path of IC706.

Each data lines confirmation checks it after standby OFF/ON.

A

2 3 4

B

C

D

E

F

32

1

VSX-820-K

2 3 4

5

JACK701 (Pin 18)

+5V_R3

Is the voltage

5 V?

Is the voltage

5 V?

Is the voltage

5 V?

Check the JACK705. If JACK705
is failure, replace JACK705.

Check the JACK704. If JACK704
is failure, replace JACK704.

Check the JACK703. If JACK703
is failure, replace JACK703.

Ye s

JACK703 (Pin 18)

+5V_R2

Ye s

No

No

JACK704 (Pin 18)

No

+5V_R1

Ye s

* When connected the equipment to IN1(BD);

* When connected the equipment to IN2(DVD);

* When connected the equipment to IN3(TV/SAT);

Is the voltage

5 V?

Check the JACK705. If JACK705
is failure, replace JACK705.

JACK705 (Pin 18)

No

+5V_R0

Ye s

* When connected the equipment to IN4(DVR/VCR);

To Step 6

Step 5: IN/OUTPUT Diagnosis (VSX-820-K)

JACK703 (Pin 18)

+5V_R3

Is the voltage

5 V?

Is the voltage

5 V?

Is the voltage

5 V?

Check the JACK703. If JACK703
is failure, replace JACK703.

Check the JACK705. If JACK705
is failure, replace JACK705.

Check the JACK704. If JACK704
is failure, replace JACK704.

Ye s

JACK704 (Pin 18)

+5V_R2

Ye s

No

No

JACK705 (Pin 18)

No

+5V_R1

Ye s

* When connected the equipment to IN1(BD);

* When connected the equipment to IN2(DVD);

* When connected the equipment to IN3(TV/SAT);

To Step 6

Step 5: IN/OUTPUT Diagnosis (VSX-520-K)

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

33

1

JACK702 (Pin 19)

HPD_SINK

Check the JACK702. If JACK702
is failure, replace JACK702.

Ye s

No

Check the JACK703 and IC703.
If JACK703 or IC703 is failure,
replace JACK703 or IC703.

JACK703 (Pin 19)

No

HPD2

Ye s

JACK704 (Pin 19)

HPD1

* When connected the equipment to IN1 (BD);

* When connected the equipment to IN2 (DVD);

Is the

voltage 5 V

when selecting

IN1?

Is the voltage

5 V?

Check the JACK704 and IC703.
If JACK704 or IC703 is failure,
replace JACK704 or IC703.

No

Ye s

Is the

voltage 5 V

when selecting

IN2?

JACK705 (Pin 19)

HPD0

* When connected the equipment to IN3 (TV/SAT);

Check the JACK705 and IC703.
If JACK705 or IC703 is failure,
replace JACK705 or IC703.

No

Ye s

Is the

voltage 5 V

when selecting

IN3?

To Step 7

Step 6: Hot plug detect (VSX-520-K)

JACK702 (Pin 19)

HPD_SINK

Check the JACK702. If JACK702
is failure, replace JACK702.

Ye s

JACK701 (Pin 19)

HPD3

Ye s

No

No

Check the JACK703 and IC703.
If JACK703 or IC703 is failure,
replace JACK703 or IC703.

JACK703 (Pin 19)

No

HPD2

Check the JACK701 and IC703.
If JACK701 or IC703 is failure,
replace JACK701 or IC703.

Ye s

JACK704 (Pin 19)

HPD1

* When connected the equipment to IN2 (DVD);

* When connected the equipment to IN1 (BD);

* When connected the equipment to IN3 (TV/SAT);

Is the

voltage 5 V

when selecting

IN2?

Is the

voltage 5 V

when selecting

IN1?

Is the voltage

5 V?

Check the JACK704 and IC703.
If JACK704 or IC703 is failure,
replace JACK704 or IC703.

No

Ye s

Is the

voltage 5 V

when selecting

IN3?

JACK705 (Pin 19)

HPD0

* When connected the equipment to IN4 (DVR/VCR);

Check the JACK705 and IC703.
If JACK705 or IC703 is failure,
replace JACK705 or IC703.

No

Ye s

Is the

voltage 5 V

when selecting

IN4?

To Step 7

Step 6: Hot plug detect (VSX-820-K)

A

2 3 4

B

C

D

E

F

34

1

2 3 4

VSX-820-K

SDA2 (HDMI IN2 (DVD))

No

IC703 (Pin 40)

Is

there a same

signal as IC702-pin 49

when selecting

IN2?

Check the IC702 and JACK703.
If IC702 or JACK703 is failure,
replace IC702 or JACK703.

* When connected the equipment to IN2 (DVD):

SCL2 (HDMI IN2 (DVD))

No

IC703 (Pin 39)

Is

there a same

signal as IC702-pin 48

when selecting

IN2?

Ye s

Check the IC702 and JACK703.
If IC702 or JACK703 is failure,
replace IC702 or JACK703.

(0 to 5 V)

SDA1 (HDMI IN3 (TV/SAT))

No

IC703 (Pin 36)

Is

there a same

signal as IC702-pin 49

when selecting

IN3?

Ye s

Check the IC702 and JACK704.
If IC702 or JACK704 is failure,
replace IC702 or JACK704.

* When connected the equipment to IN3 (TV/SAT):

SCL1 (HDMI IN3 (TV/SAT))

No

IC703 (Pin 35)

Is

there a same

signal as IC702-pin 48

when selecting

IN3?

Ye s

Check the IC702 and JACK704.
If IC702 or JACK704 is failure,
replace IC702 or JACK704.

(0 to 5 V)

(0 to 5 V)

SDA0 (HDMI IN4 (DVR/VCR))

No

IC703 (Pin 32)

Is

there a same

signal as IC702-pin 49

when selecting

IN4?

Ye s

Check the IC702 and JACK705.
If IC702 or JACK705 is failure,
replace IC702 or JACK705.

* When connected the equipment to IN4 (DVR/VCR):

SCL0 (HDMI IN4 (DVR/VCR))

No

IC703 (Pin 31)

Is

there a same

signal as IC702-pin 48

when selecting

IN4?

Ye s

Check the IC702 and JACK705.
If IC702 or JACK705 is failure,
replace IC702 or JACK705.

(0 to 5 V)

(0 to 5 V)

To Step 8

IC702 (Pin 47)

SDA (HDMI OUT)

SDA3 (HDMI IN1(BD))

Does

a signal output in

constant period

(0 to 5 V)

?

Check the JACK702 and IC702.
If JACK702 or IC702 is failure,
replace JACK702 or IC702.

No

No

No

Ye s

IC702 (Pin 46)

SCL (HDMI OUT)

Does

a clock output in

constant period

(0 to 5 V)

?

Check the JACK702 and IC702.
If JACK702 or IC702 is failure,
replace JACK702 or IC702.

Ye s

IC703 (Pin 44)

Is

there a same

signal as IC702-pin 49

when selecting

IN1?

Ye s

Check the IC702 and JACK701.
If IC702 or JACK701 is failure,
replace IC702 or JACK701.

* When connected the equipment to IN1(BD);

SCL3 (HDMI IN1(BD))

No

IC703 (Pin 43)

Is

there a same

signal as IC702-pin 48

when selecting

IN1?

Ye s

Ye s

Check the IC702 and JACK701.
If IC702 or JACK701 is failure,
replace IC702 or JACK701.

SDA_SINK

No

No

SCL_SINK

IC702 (Pin 49)

Is

there a same

signal as IC703-pin 24

(0 to 3.3V)

?

Ye s

Check the IC702 and IC703.
If IC702 or IC703 is failure,
replace IC702 or IC703.

Check the IC702 and IC703.
If IC702 or IC703 is failure,
replace IC702 or IC703.

IC702 (Pin 48)

Is

there a same

signal as IC702-pin 23

(0 to 3.3V)

?

Ye s

(0 to 5 V)

(0 to 5 V)

Step 7: SDA /SCL (VSX-820-K)

5

6 7 8

A

B

C

D

E

5

VSX-820-K

6 7 8

F

35

1

IC702 (Pins 30,31,33,34,36,37,39,40)

TMDS OUTPUT

SDA2 (HDMI IN1 (BD))

No

IC703 (Pin 40)

Is

there a same

signal as IC702-pin 49

when selecting

IN1?

Check the IC702 and JACK703.
If IC702 or JACK703 is failure,
replace IC702 or JACK703.

* When connected the equipment to IN1 (BD):

SCL2 (HDMI IN1 (BD))

No

IC703 (Pin 39)

Is

there a same

signal as IC702-pin 48

when selecting

IN1?

Ye s

Check the IC702 and JACK703.
If IC702 or JACK703 is failure,
replace IC702 or JACK703.

Check the IC702 or IC703.
If IC702 or IC703 is failure,
replace IC702 or IC703.

(0 to 5 V)

End

No

Are there

signals(approx. 0.5

Vp-p) in all

lines?

Ye s

Step 8: TMDS

SDA1 (HDMI IN2 (DVD))

No

IC703 (Pin 36)

Is

there a same

signal as IC702-pin 49

when selecting

IN2?

Ye s

Check the IC702 and JACK704.
If IC702 or JACK704 is failure,
replace IC702 or JACK704.

* When connected the equipment to IN2 (DVD):

SCL1 (HDMI IN2 (DVD))

No

IC703 (Pin 35)

Is

there a same

signal as IC702-pin 48

when selecting

IN2?

Ye s

Check the IC702 and JACK704.
If IC702 or JACK704 is failure,
replace IC702 or JACK704.

(0 to 5 V)

(0 to 5 V)

SDA0 (HDMI IN3 (TV/SAT))

No

IC703 (Pin 32)

Is

there a same

signal as IC702-pin 49

when selecting

IN3?

Ye s

Check the IC702 and JACK705.
If IC702 or JACK705 is failure,
replace IC702 or JACK705.

* When connected the equipment to IN3 (TV/SAT):

SCL0 (HDMI IN3 (TV/SAT))

No

IC703 (Pin 31)

Is

there a same

signal as IC702-pin 48

when selecting

IN3?

Ye s

Check the IC702 and JACK705.
If IC702 or JACK705 is failure,
replace IC702 or JACK705.

(0 to 5 V)

(0 to 5 V)

To Step 8

IC702 (Pin 47)

SDA (HDMI OUT)

Does

a signal output in

constant period

(0 to 5 V)

?

Check the JACK702 and IC702.
If JACK702 or IC702 is failure,
replace JACK702 or IC702.

No

No

Ye s

IC702 (Pin 46)

SCL (HDMI OUT)

Does

a clock output in

constant period

(0 to 5 V)

?

Check the JACK702 and IC702.
If JACK702 or IC702 is failure,
replace JACK702 or IC702.

Ye s

Ye s

Ye s

SDA_SINK

No

No

SCL_SINK

IC702 (Pin 49)

Is

there a same

signal as IC703-pin 24

(0 to 3.3V)

?

Ye s

Check the IC702 and IC703.
If IC702 or IC703 is failure,
replace IC702 or IC703.

Check the IC702 and IC703.
If IC702 or IC703 is failure,
replace IC702 or IC703.

IC702 (Pin 48)

Is

there a same

signal as IC702-pin 23

(0 to 3.3V)

?

Step 7: SDA /SCL (VSX-520-K)

A

2 3 4

B

C

D

E

F

36

1

VSX-820-K

2 3 4

5

Key Sequence Change

Error 1
Communication Error
When the communication is not possible normally.

[Procedure]
Disconnect a connector once, then connect a
connector surely again after the main menu of the
iPod was displayed.
Nevertheless, reset the iPod when the iPod does
not operate normally.

Error 2
Generation Error (in the Type 1 operation only)
When the non-support model for the iPod Mode
Type 1 was connected.
When the non-support function will be executed.
When a version of the iPod software is old.

[Procedure]
Change the iPod Mode to Type2.
Update the iPod software to the newest version.

Error 3
Loading Error
When there is no response from the iPod.

[Procedure]
The power is shut off once, then the unit back on.
Reset the iPod.
Update the iPod software to the newest version.

Error 4
OverHeat Error

No Track
No Music Track Cautuion

When a track does not exist in the selected
category

[Procedure]
Select another category.

iPod Error Message

When the abnormality occurred, the error messages are indicated.

OSD Display

FL Display

[3] USB iPod TROUBLESHOOTING (VSX-820-K ONLY)

iPod

I / U E R R 1

iPod/USB Error 1

iPod

I / U E R R 2

iPod/USB Error 2

iPod

I / U E R R 3

iPod/USB Error 3

iPod

I / U E R R 4

iPod/USB Error 4

iPod

N O T R A C K

No T r ac k

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

37

1

iPod Troubleshooting

Step 0: Preliminary confirmation

Step 1: Power supply

Confirm the following items before checking.

To STEP 1

To STEP 2

Do screws of

COAX jack securely

tighten ?

Tighten screws securely.

Check the patterns in
the path.

No

Ye s

To STEP 1

Ye sYe s

Is there any
loose connection
CP105 of MAIN

Assy?

Check the MAIN
Assy.

No

CN807 (pins 1, 3)

REG2 (pin 3)

Is

the voltage

5 V ?

No

Ye s

Is REG1

abnormally

hot?

No

No

Ye s

Is REG2

abnormally

hot?

No

No

5 V input

(to chassis)

3.3 V output (to chassis)

5 V input

Replace REG2.

The output and GND may be
short-circuited. Check the path
between them.

Ye s

Ye s

Is

the voltage of

5 V input?

No

REG2 (pin 2)

Ye s

Is

the voltage

3.3 V output?

Check the patterns in
the path.

REG1 (pin 3)

Is

the voltage

5 V ?

No

Ye s

1.8 V output

REG1 (pin 2)

Is

the voltage

1.8 V output?

Replace REG1.

The output and GND may be
short-circuited. Check the path
between them.

Replace IC805.

Ye s

Ye s

Ye s

Is pin 4

(EN) of IC805

Low?

Is

the voltage

5 V input?

No

Ye s

Is pin 3

(OC) of IC805

high?

No

No

Check the parts and
patterns in the path
(JACK801).

IC805 (pin 1)

USB Bus power

Is

the voltage

5 V output?

Check the parts and patterns
in the path of JACK801.

No

IC805 (pin 5)

5 V input

A

2 3 4

B

C

D

E

F

38

1

VSX-820-K

2 3 4

5

Step 2: Operation of USB Media control IC

Is there

a 12 MHz

output?

Check the parts and patterns in the path.
Replace XTAL1, etc.

Ye s

No

Ye s

No

IC801 (pins 54,55)

CP802 USB_RX, TX (Pins 4, 3)

IC801 (pin 44) -> IC803 (pin 38)

XIN/XOUT

Do

USB_RX and USB_TX

communication with

main micom?

Operation of IC801 is OK.

To STEP 3

Operation of IC801 is OK.
To STEP 3

DATA and ADDRESS lines
between SDRAM (IC803),
FLASH ROM (IC802) and IC801
are may not be connected.

D+ and D- should have
waveform during normal
condition.
Check the pattern in the path of
IC801, etc.

USB_RX and USB_TX should
be high during operation.
Check the pattern in the path of
the FRONT and MAIN Assys.

Are

there the waveforms

like figure?

After

turning the power

on and several seconds

later, does SDCLK change

12 MHz to 80 MHz?

Ye s

Ye s

No

No

JACK801 (pins 2,3)

D+/D-

Initial communication [SDCLK]

Fig. D+

X: 1 μS/div, Y: 2 V/div

X: 1 μS/div, Y: 2 V/div

Fig. D-

Ye s

Is

CP802 pins 1, 2

(RESET, RDY)

high?

Ye s

Check

CP105, CN802 of

FRONT and MAIN

Assy.

No No

Check the path to
MAIN Assy.

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

39

1

Step 3: Operation of iPod (Authentication process)

Do
SCL and SDA
communicate?

Ye s

No No

IC804 (pins 12, 13)

SCL, SDA (I2C between IC801 and IC804)

Does RESET_AUTH

(pin 4) reset it?

High after the reset

Replace IC804.

When SCL and SDA are
normal operation = High (3.3 V),
connect iPod, and communicate
it about 10 seconds later
(authentication starts).
And communicate it about 60
seconds later (authentication is
complete).

Check the path between
IC801 (pin 120).

No

Ye s

Step 4 Audio Out check

Is there

a S/PDIF signal

?

Replace IC801.

Ye s

No

CN805 (pin 1)

S/PDIF output

Check the

path between IC801

(pin 105)

Check the parts and pattern
of CN805 and IC801.

Ye s

No

Operation of IC804 is OK.

To STEP 4

Refer to the [1] DSP
TROUBLESHOOTING.

A

2 3 4

B

C

D

E

F

40

VSX-820-K

1

2 3 4

5

Step 0: Preliminary confirmation

Step 1: BT_DET

Step 2: Power supply

Step 3: BT_DET

Confirm the following items before checking.

To STEP 1

To STEP 2

Check the INPUT Assy.

Do screws of

Plate_Screw securely

tighten ?

Tighten screws securely.

Check the patterns in
the path.

No

Ye s

To STEP 2

Ye sYe s

Is there any
loose connection
CN501 of MAIN

Assy?

Check the patterns
inthe path and
MAIN Assy.

No

CP501 (pin 4)

IC500 (pin 1)

Is

the voltage

5 V ?

No

3.3 V

Is

IC500-pin 3

(EN) 3.3 V?

0 V

No

5 V input

(to chassis)

Ye s

Is

the voltage of

5 V input?

No

Check the patterns in
the path and MAIN Assy.

Check the MAIN Assy
and CP501 (8P).

Check the patterns
in the path and
replace IC500.

CP501 (pin 2)

BT_DET

Ye s

Is the voltage

0 V?

No

To STEP 3

Check the patterns
in the path.

CN500 (pin 17)

5 V input

Ye s

Is the voltage

5 V?

No

To STEP 4

Check the patterns in
the path and MAIN Assy.

CP501 (pin 2)

BT_DET

Ye s

Is

the voltage

0.7 V to 12 V
?

No

Step 4: Communicaion

Step 5: Audio Out check

To STEP 5

BT_RXD and BT_TXD should
be high during operation.
Check the patterns in the path
and MAIN Assy.

CP501 (pins 6,7)

BT_RXD, BT_TXD

Ye s

No

Ye s

5 V output (to chassis)

IC500 (pin 6)

Is

the voltage

5 V output?

0 V

Is

Q500-base

(BT_ON/OFF/CE)

0 V?

3.3 V

Check the patterns
in the path and
replace Q500.

Ye s

CP502 (pins 1,4)

Is

there a audio

signal?

Check the parts in the path.

No

Do

BT_RXD and

BT_TXD commu-

nicate with the main

UCOM?

[4] BT (BlueTooth) TROUBLESHOOTING

6 7 8

A

B

C

D

5

VSX-820-K

6 7 8

E

F

41

1

Functional Name

Adapter port overcurrent detection

Outline

When the BT adapter is inserted in Adapter port, turn off the power of the Adapter port forcibly when it detects an
overcurrent. And display ERROR state in FL.

Explain Operation Detail

For detection method

• Confirm a detection port at intervals of 20 msec to 50 msec (*2), and judge it as an overcurrent when you detected an
error consecutively three times.

*2 It is assumed that it is fixed value of the 20 msec to 50 msec degree.

*1 Return the "ADP ERR" display to the normal display if you change it into other FUNCTION only in the
APAPTER PORT FUNCTION.
Also display "ADP ERR" if the APAPTER PORT FUNCTION is ERROR state.

Basic Operation

Front Key Sequence
Change

Character Display Time (sec.)

Icon Display
(FL)

LED Display

A

*1

When the overcurrent is
detected

The display continues
until the power is
turned off.

Check it after turning the power once
off then back on again, and it becomes
the normal operation if normal.

D P E R R

12 12345678

2 3 4

5.2 ADAPTER ERROR MESSAGE

A

B

C

D

E

F

42

1

2 3 4

VSX-820-K

5

[1] DC Protection Circuit Diagram

MAIN ASSY

Q

SPEAKER ASSY

C

PT ASSY

G

AMP ASSY

B

5.3 DETECTION CIRCUIT

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

43

1

[2] Overload Protection Circuit Diagram

MAIN ASSY

Q

PT ASSY

G

AMP ASSY

B

A

2 3 4

B

C

D

E

F

44

1

2 3 4

VSX-820-K

5

[3] Power DC Protection Circuit Diagram

MAIN ASSY

Q

PT ASSY

G

Q106 KTB778

VSX-820-K ONLY

Q203

KTC107S

HDMI_3.3V

-5V

+5V

R105

IC114

R237

IC102

KIA7805API

KIA7905PI

R218

22k

IC111

KIA78R33API

C211

C225

C231C110

C232

R235R236

C113

R220

22k

R219

47k

C222

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

45

1

[1] Display mode for numbers of protection detections

[Purpose]

[Basic operations]

FL Display Description of IndicationsKey Operation

(STANDBY state)

[PRESET –] +
[STANDBY/ON]
(Initial display)

[ENTER key]

[ENTER key]

[ENTER key]

(Initial display)

5 (-> normal) *1

5 (-> normal) *1

5 (-> normal) *1

Number of DC error detections

Number of OVERLOAD error detections

Number of abnormal-temperature

error detections

Time (sec.)

The numbers of detections for various protection processes are displayed.

*1 “5 (-> normal)” denotes that the display will return to the normal indication when no key operation is
performed for 5 seconds.
*2 Variable range: 0-255

[How to enter/exit]

During Standby mode, simultaneously press and hold the [PRESET –] and [STANDBY/ON] keys for 2 seconds to
enter this mode.
The display will return to the normal indication when no key operation is performed for 5 seconds.

Counter

Counter

Counter

*2

*2

*2

2 3 4

6. SERVICE MODE

6.1 SERVICE MODE

A

B

C

D

E

F

46

1

2 3 4

VSX-820-K

5

[2] Reset mode for numbers of protection detections

[Purpose]

[Basic operations]

FL Display Description of IndicationsKey Operation

(STANDBY state)

[STANDARD SURROUND]
+ [STANDBY/ON]
(press and hold the keys
for 10 seconds.)

(Counter Clear end)

[ENTER key]

(Normal display)

5 (-> normal) *1

5 (-> normal) *1

usually

*2

Time (sec.)

For clearing all the counts of protection detections.
(This mode resets the counts of protection detections.)

1. When the procedures for Reset mode for numbers of protection detections are completed, all the counters
will be reset to “000.”

2. Prohibitions:
The protection detection counts cannot be cleared (reset to 000) with the MEMORY CLEAR process.
They can only be cleared when the procedures of Reset mode are completed.

*1 “5 (-> normal)” denotes that the display will return to the normal indication when no key operation is
performed for 5 seconds.
*2 Indication when the BD
function is selected

[How to enter/exit]

During Standby mode, simultaneously press and hold the [STANDARD SURROUND] and [STANDBY/ON] keys
for 10 seconds to enter this mode.
The display will return to the normal indication when no key operation is performed for 5 seconds.

[Detailed explanations]

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

47

1

[3]

The unit’s operation when a error is detected

[Purpose]

[Basic operations]

FL Display Description of IndicationsKey Operation

3.1 DC (AMP is abnormality) error detection

(Normal display)

(DC detection)

(Auto)

(RECEIVER POWER OFF)

usually

*1, *2

Normal display

Time (sec.)

• The unit’s operation when a DC/OVER/TEMP error is detected is described here.

• How to cancel the status after detection of a DC error is described here, because no key input will be
accepted after a DC error detection.

*1 The time required for the unit to be shut off after an error is detected depends on the circuit configuration.
(However, 3 seconds after DC is internally detected, the unit will shut itself off.)
*2 If the unit is automatically shut off after a DC error is detected, no key input will be accepted afterward.
(The power will not be turned ON.)
To turn it on again, see “3.4 How to cancel the status after detection of a DC error” below.
A key input will not be inhibited after an OVERLOAD/TEMP error is detected. (The unit can be turned ON.)

Simultaneously holding the [ADVANCD SURROUND] and [STANDBY/ON] keys on the
front panel pressed for 2 seconds will cancel Key Input Inhibition mode after a DC error
detection and turn the unit ON.

[Detailed explanations]

FL Display Description of IndicationsKey Operation

3.2 OVERLOAD (overcurrent) error detection

(Normal display)

(OVERLOAD detection)

(Auto)

(RECEIVER POWER OFF)

usually

*1

Normal display

Time (sec.)

FL Display Description of IndicationsKey Operation

3.3 TEMP (AMP overheat) error detection

(Normal display)

(TEMP detection)

(Auto)

(RECEIVER POWER OFF)

usually

*1

Normal display

Time (sec.)

FL Display Description of IndicationsKey Operation

3.4 How to cancel the status after detection of the DC error

(STANDBY state)

(Normal display)

usually

Normal display

Time (sec.)

[ADVANCED SURROUND]
+ [STANDBY/ON]
(press and hold the keys
for 2 seconds.)

A

2 3 4

B

C

D

E

F

48

1

2 3 4

VSX-820-K

5

1. Discharging

(1) Unplug the power cord.
(2)

Disconnect the 8P CONNECTOR that connects the CN202 of the AMP Assy and CP107 of the MAIN Assy from the CP107.
(3) Connect CP107 B+ (pins 5 and 6) and B- (pins 7 and 8, respectively) terminals, using resistor leads with 47 - 100 ohms
(2 W or higher), for discharging.
∗ Discharging time: 30 - 60 seconds, depending on the level of resistance.
(4) Check that the voltage between the B+ and GND terminals, as well as that between the B- and GND terminals, is less
than 1 V, using a tester.
∗ Be sure to connect the GND terminal of the tester to the chassis.
∗ If the voltage is still 1 V or higher, repeat Step (3).

[1] MAIN Assy Capacitor (C179, C180)

[Procedures]

(1) Unplug the power cord.
(2) Connect CP704 -30 V (pins 1 and 2) of the FRONT Assy and GND (pins 3 and 4, respectively), using resistor leads
with 47-100 ohms (2 W or higher), for discharging.
∗ Discharging time: 5 - 10 seconds, depending on the level of resistance.
(3) Check that the voltage between the -30 V and GND terminals is less than 1 V, using a tester.
∗ Be sure to connect the GND terminal of the tester to the chassis.
∗ If the voltage is still 1 V or higher, repeat Step (2).

[2] FL-30 V Capacitor

[Procedures]

47 - 100 ohms
(2 W or higher)

47 - 100 ohms
(2 W or higher)

C179

B–

B+

CP107

C180

Note:

(1) Even if the unit shown in the photos and illustrations in this manual may differ from your product, the
procedures described here are common.
(2) For performing the diagnosis shown below, the following jigs for service is required:

• 10P extension jig cable (GGD1628)

• 8P extension jig cable (GGD1629)

• Board to board extension jig cable (GGD1673)

MAIN Assy

FRONT Assy

6 7 8

7. DISASSEMBLY

A

B

C

D

E

F

VSX-820-K

5

6 7 8

49

1

2. Notes on Ground Points Connection

During repair, before checking the MAIN Assy, etc., with the rear chassis removed, be sure to connect the
GND terminal of the main capacitor to the chassis back (TUNER PACK chassis), as shown below, then connect the
power cord.

Without grounding connection, the protection circuit will be activated.
After repairing, be sure to remove the ground wire before reassembling.

[Note]

Main capacitor GND

MAIN Assy (SIDE B)

TUNER PACK chassis

Chassis back

GND wire

(Be sure to disconnect the GND wire
before reassembly.)

A

2 3 4

B

C

D

E

F

50

1

2 3 4

VSX-820-K

5

3. Disassembly

[1] Front Panel Section

Remove the cabinet by removing the 10 screws.

(1) Remove the six screws. (BBZ30P080FTB)

(2) Remove the four screws. (BBZ30P080FTC)

(3) Remove the two screws. (BBZ30P080FTC)
(4) Unhook the two hooks.

(5) Arrange the front panel section as shown
in the photo below.

1 1

2

2

22

3

4

5

3

4

3

4

1 1 1 1

• Bottom view

GUIDE_R Assy

2

2

GUIDE_R Assy

(VSX-820-K)

(VSX-820-K)

(VSX-520-K)

(VSX-520-K)

GUIDE_L Assy

Front panel section

6 7 8

A

B

C

D

5

6 7 8

VSX-820-K

E

F

51

1

(1) Secure the wires from the USB Assy. (4) Style the 4P wire (F-VIDEO) so that it goes below the

corresponding cables marked with circles in the figure
below.

(5) Style the remaining two wires above wire A, which
connects the AMP and INPUT Assys.

(2) Secure the card cable with the clamps.

(3) Wrap the remaining wires with CU tape foil then secure
them with a cable tie.

CABLE DRESSING (VSX-820-K ONLY)

GUIDE_R Assy

Clamp

Wire (USB <-> DSP)

Card cable

Wires

CU tape foil

Cable tie

Wire A

Style the wires so that they
are placed above wire A.

Wire (USB <-> MAIN)

4P wire

A

2 3 4

B

C

D

E

F

52

1

2 3 4

VSX-820-K

5

(6) Secure the cables bound with CU tape foil to the chassis,
using a cable tie for grounding.

• The wires bound with CU tape foil (part No.: 1220-21087-900-0S) are shown below.

When repairing an assy on the front side, as the wires are secured to the assys,
it is necessary to peel off CU tape foil to unbind the wires in order to disconnect them.
After repair, wrap the wires again, using new CU tape foil.

When repairing an assy on the rear side, as the wires are disconnected/connected
with connectors, you don't have to peel off CU tape foil.

After disconnecting the wires, style them again, following the procedures shown above.

Cable tie

Directly mounted wire

Chassis

USB Assy

Front side Rear side

CU tape foil

DSP Assy

Directly mounted wire

F-VIDEO Assy

MAIN Assy

Directly mounted wire

MIC Assy

INPUT Assy

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

53

1

[2] Heatsink Section

Remove the cabinet by removing the 10 screws.

Caution: Heatsink section in work becomes hot,
and be careful with it.

(1) Remove the seven screws. (BBZ30P080FTC)

(2) Remove the four screws. (BBZ30P080FTC)

(3) Disconnect the two connectors.

1

1
1

1
1

1
1

1 1

• Bottom view

3

3

INPUT Assy

MAIN Assy

AMP Assy Heatsink section

CP107

CP801

2

2

22

GUIDE_R Assy

2

2

GUIDE_R Assy

(VSX-820-K) (VSX-520-K)

GUIDE_L Assy

(VSX-820-K)

(VSX-520-K)

A

B

2 3 4

C

D

E

F

54

1

VSX-820-K

2 3 4

5

(4) Connect the two extension jig cables.
(5) Rotate the heatsink section in the direction of
the arrow.

Note:

The power transistor on the AMP Assy and
heatsink on the MAIN Assy come closer.
Make sure that they will not come into contact.

4

Heatsink section + AMP Assy

10P extension jig cable
(GGD1628)

Heatsink section + AMP Assy

4

8P extension jig cable
(GGD1629)

CP801

CP107

5

AMP Assy

Power transistor
Heatsink

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

55

1

[3] MAIN Assy

Remove the cabinet by removing the 10 screws.

(1) Remove the seven screws. (BBT30P100FTB)

(2) Remove the three screws. (BBZ30P080FTC)
(3) Remove the six screws. (BBZ30P180FTC)

(4) Arrange the unit as shown in the photo below.
(5) Connect the chassis ground.
See “2. Notes on Ground Points Connection”.

• Rear view (VSX-820-K)

(VSX-520-K)

MAIN Assy

MAIN Assy

1

1

1

1

3

3

3

3

3

3

2

2

2

1

1 1

4

5

• Rear view

1

1

1

1

1

1

1

A

2 3 4

B

C

D

E

F

56

VSX-820-K

1

2 3 4

5

[4] DSP Assy (for VSX-820-K)

Remove the cabinet by removing the 10 screws.

(1) Remove the five screws. (B020930083B10-IL)
(2) Remove the one screw. (BMZ30P100FTB)
(3) Remove the 24 screws. (BBT30P100FTB)
(4) Remove the seven screws. (BBT30P100FTB)
(5) Remove the chassis back.

(6) Remove the DSP Assy.
(7) Remove the two connectors and remove the
BT Assy.

Notes:

The soldered portions of the extension jigs may
have become in poor connection, depending on
usage environment, etc. Be sure to confirm
soldered portions before use and enhance
soldering, if necessary.
During attaching/detaching the jig, be careful not
to damage the connectors or injure yourself.

During failure diagnosis using the extension jig,
the cable connecting CP200 on the MAIN Assy
and CN200 on the DSP Assy can be disconnected.

(8) Connect the board to board extension jig cable.
(9) Reassembling the chassis back.
Secure the HDMI, INPUT, and VIDEO Assys,
using at least one screw each, and the chassis
back and chassis, using at least two screws.
(10) Remove the one connector and remove the
CNT2 Assy.

• Rear view

Chassis back

Chassis back

CNT2 Assy

DSP Assy BT Assy

DSP Assy

Board to board extension
jig cable (GGD1673)

4
4

4
4

4

2

4 4

3

×24

1

×5

5

6

7

10

9

8

6 7 8

A

B

C

5

6 7 8

VSX-820-K

D

E

F

57

1

[4] DSP Assy (for VSX-520-K)

Remove the cabinet by removing the 10 screws.

(1) Remove the four screws. (B020930083B10-IL)
(2) Remove the 22 screws. (BBT30P100FTB)
(3) Remove the seven screws. (BBT30P100FTB)
(4) Remove the chassis back.

(5) Remove the DSP Assy.
(6) Remove the two connectors and remove the
BT Assy.

(7) Connect the board to board extension jig cable.
(8) Reassembling the chassis back.

Secure the HDMI, INPUT, and VIDEO Assy,

using at least one screw each, and the chassis
back and chassis, using at least two screws.
(9) Remove the one connector and remove the
CNT2 Assy.

• Rear view

Chassis back

Chassis back

DSP Assy BT Assy

DSP Assy

Board to board extension
jig cable (GGD1673)

3
3

3

3

3

2

×22

1

×4

4

5

6

8

9

7

3
3

Notes:

The soldered portions of the extension jigs may
have become in poor connection, depending on
usage environment, etc. Be sure to confirm
soldered portions before use and enhance
soldering, if necessary.
During attaching/detaching the jig, be careful not
to damage the connectors or injure yourself.

CNT2 Assy

A

2 3 4

B

C

D

E

F

58

1

VSX-820-K

2 3 4

5

• RS-232C cable (9-pin to 9-pin, straight cable)

• PC with a serial port

• Firmware for updating USB (VSX_USB.rom)(VSX-820-K ONLY )

• Firmware ("mot" extension)

[Connections]

[Necessary Tools]

[Purpose]

Refer to this section when updating the firmware of each microcomputer is required by the service information, etc.

[1] MAIN, SUB, USB and DSP microcomputers

PC

UPDATE jig

GGF1642

RS-232C

Straight cable

Rear side (VSX-820-K)

8P

8P

• RS-232C UPDATE jig : GGF1642 (Do not use FFC of GGF1642. Remove it and
insert GGD1676 on 10 pin connector of board.)

• 10P to 8P FFC : GGD1676

10P to 8P FFC
GGD1676

Insert the FFC with its contact surface
facing the " mark.

(SUB microcomputer)

(MAIN microcomputer)

2 Enter ID.
Enter "ff" in all field.

1 Select the update file.

Select "***.mot" file to update the MCU.

Press the OK button.

3 Press OK button to go to
next step.

Connect as shown in the figure below.

[Procedures]

1) MAIN and SUB microcomputers

1 Start up the application on the PC before plugging in the
power cord of the main unit.

4 Select the update file and enter ID.

2 Plug the AC cord.

For updating of the Main microcomputer, proceed with
the following steps in STANDBY mode.
In a case of the SUB microcomputer, turn the main unit on.

3 Press the OK button.

1 Select the update file.

10P

1

3

2 Enter ID.
3 Press OK button.

6 7 8

8. EACH SETTING AND ADJUSTMENT

8.1 HOW TO UPDATE FIRMWARE

A

B

C

D

5

VSX-820-K

6 7 8

E

F

59

1

2 Update the MCU.
E.P.R=>Erase+Program+Read

1 Set speed of update.

Set Baud rate to 38400.

If the following messages are displayed, shut the update program down, and start the update again from step 1.

Press OK button.

5 Set speed update and update the MCU.

6 Finished.

7 Press the EXIT button to terminate the updating program.

Unplug the AC cord of the unit then disconnect the FFC of the updating jig.

1 Set speed of update. 2 Update the MCU.

Press the E.P.R button.

A

B

2 3 4

C

D

E

F

60

1

2 3 4

VSX-820-K

5

[Procedures]

2) How to Update the USB Microcomputer (VSX-820-K ONLY)

1. Copy the “VSX_USB.rom” file to the root directory of a USB memory device.

2. Press the iPod USB key on the remote control unit to select iPod/USB function then connect the USB memory device.

3. After accessing the USB memory device, “UPG? NO” is displayed on the FL display and “UPDATE? NO” is displayed
as an On-Screen display.

4. Press the iPod USB key on the remote control unit.

5. Send either iPod/USB Cursor Left or iPod/USB Cursor Right code.

6. “UPG? YES” is displayed on the FL display and “UPDATE? YES” is displayed as an On-Screen display.

7. After sending the iPod/USB Enter code, updating starts. (“UPDATE” is displayed on the FL display.)

8. When “UPG? NO” is displayed on the FL display and “UPDATE? NO” is displayed as the On-Screen display,
updating is completed.

9. Disconnect the USB memory device then turn the unit off.

[Procedures]

3) How to update the DSP Microcomputer

1. Select an Input Function that allows reception via Optical input 1 or 2 then set the unit to STBY_Off mode.

2. Press the SPEAKERS and STANDBY/ON keys simultaneously to enter DSP UpDate mode.
(“DSP UP” is displayed.)

3. When “PLAY” is displayed, playback of the .wav file starts. (Play the file only once. NEVER repeat playback.)
(“PLAY” is displayed.)

4. After playback is finished and “ENTER” is displayed, press the ENTER key on the front panel.
(“ENTER” is displayed.)

5. “WRITING” is automatically displayed.

6. After writing is completed, “COMPLETE” is displayed.

7. Turn the unit off then confirm that the version has been updated.

[How to Confirm the Version of the USB Microcomputer]

1. Select the iPod/USB function then turn the unit off.

2. While holding the ENTER key on the front panel pressed, press the STNADBY/ON key.

3. When the receiver is turned on, press the ENTER key on the main unit three times.
(Each time the ENTER key is pressed, the indications on the FL display change as follows:
Main -> Sub -> DSP -> USB -> All segments lit.)

4. The version is displayed on the FL display, as “USB:***.”

Notes on updating

• If you perform updating of the same software twice, it may fail.

• If the indication “UPDATE” on the FL display does not change, let it sit for a few minutes.
If the indication on the FL display changes to one other than “UPDATE,” the unit becomes operable.
Turn the unit off after it becomes operable.

[ Display of each UCOM (microcomputer) version]

Reference

Press and hold the [ENTER] and [STANDBY/ON] keys, then press the [ENTER] key to display each UCOM version.
(Each time the ENTER key is pressed, the indications on the FL display change as follows:)

Make sure that the main unit is in Standby mode.

* The version of the USB microcomputer is displayed
only when USB/IPOD FUNCTION is selected.

SUB
UCOM

[ENTER] [ENTER] [ENTER] [ENTER]

DSP
UCOM

USB
UCOM

All segments lit.

VSX-820-K
ONLY

Pressing the [ENTER] key returns
the display to that for the version
of the MAIN UCOM.

MAIN
UCOM

6 7 8

A

B

C

5

VSX-820-K

6 7 8

D

E

F

61

1

1. Idle Current Adjustment

Procedure

1 Turn on the power.

2 Perform aging for one minute.

3 Connect a digital voltmeter to the measurement point.

4 Turn the adjustment VR so that the voltage becomes
in 2.0 mV ± 0.2 mV.

(Condition : No signal and no load)

Adjustment

Points

VR201FL

VR201FR

VR201C

VR201SL

VR201SR

Measurement Points

TP201FL 3PIN : TEST POINT(+)
TP201FL 1PIN : TEST POINT(-)

TP201FR 3PIN : TEST POINT(+)
TP201FR 1PIN : TEST POINT(-)

TP201C 3PIN : TEST POINT(+)
TP201C 1PIN : TEST POINT(-)

TP201SL 3PIN : TEST POINT(+)
TP201SL 1PIN : TEST POINT(-)

TP201SR 3PIN : TEST POINT(+)
TP201SR 1PIN : TEST POINT(-)

• Adjustment Point and Measurement Points.... see fig1.

AMP ASSY

[Fig 1.]

B

SIDE A

Idle current
VR: VR201FL

Idle current
VR: VR201SL

Idle current
VR: VR201C

Idle current
VR: VR201SR

Idle current
VR: VR201FR

TP201FL 1PIN
TEST POINT(-)

TP201C 1PIN
TEST POINT(-)

TP201SL 1PIN
TEST POINT(-)

TP201SR 1PIN
TEST POINT(-)

TP201FL 3PIN
TEST POINT(+)

TP201SL 3PIN
TEST POINT(+)

TP201C 3PIN
TEST POINT(+)

TP201SR 3PIN
TEST POINT(+)

TP201FR 1PIN
TEST POINT(-)

TP201FR 3PIN
TEST POINT(+)

2 3 4

8.2 IDLE CURRENT ADJUSTMENT

A

B

C

D

E

F

62

VSX-820-K

1

2 3 4

5

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

63

1

NOTES: - Parts marked by “NSP” are generally unavailable because they are not in our Master Spare Parts List.

-

The > mark found on some component parts indicates the importance of the safety factor of the part.

Therefore, when replacing, be sure to use parts of identical designation.

-

Screws adjacent to b mark on product are used for disassembly.

-

For the applying amount of lubricants or glue, follow the instructions in this manual.

(In the case of no amount instructions, apply as you think it appropriate.)

Poly bag packing style

VSX-820-K/CUXCNSM

Only
VSX-820-K/CUXCNSM
Only

Cord AC

Tape (clear)

1/2

2/2

2 3 4

9. EXPLODED VIEWS AND PARTS LIST

A

9.1 PACKING SECTION

B

C

D

E

F

64

1

2 3 4

VSX-820-K

5

6 7 8

(1) PACKING SECTION PARTS LIST

Mark No. Description Part No.

1 Remote Control See Contrast table (2)

NSP 2 Dry Cell Batteries G670001R50210-IL

(AAA size IEC R03)
3 AM Loop Antenna E601016000010-IL
4FM Wire Antenna E605010070001-IL

5Setup Microphone See Contrast table (2)

(for Auto MCACC setup)
6 iPod Cable See Contrast table (2)
7 Operating Instructions See Contrast table (2)

(En, Frca, Es)

A

8 Poly Bag 6330210059000-IL

NSP 9 Poly Bag 6337040062010-IL

10 Box, Gift See Contrast table (2)
11 Cushion, Snow 6230212824000-IL
12 PE, Sheet 6327040059000-IL

13 Sheet 5227000001050-IL

NSP 14 Label VRW1629

15 • • • • •

NSP 16 Label Getter See Contrast table (2)

(2) CONTRAST TABLE

VSX-820-K/CUXCNSM and VSX-520-K/CUXCNSM are constructed the same except for the following:

Mark No. Symbol and Description

1 Remote Control 8300758300010-IL 8300758600010-IL
5Setup Microphone (for Auto MCACC setup) M040000300200-IL Not used
6 iPod Cable L308102013010-IL Not used
7 Operating Instructions (En, Frca, Es) 5707000003160-IL 5707000003110-IL

10 Box, Gift 6007211700060-IL 6007211700000-IL

VSX-820-K

/CUXCNSM

B

C

VSX-520-K

/CUXCNSM

D

NSP 16 Label Getter 5507000004540-IL 5507000004530-IL

VSX-820-K

5

6 7 8

E

F

65

1

N

O

O

P

U

K

D

E

1/2

Nut

Nut

×

6

×

6

×

2

×

5

×

2

×

3

×

5

×

5

×

14

×

2

2/2

2 3 4

9.2 EXTERIOR SECTION (VSX-820-K)

A

B

C

D

E

F

66

VSX-820-K

1

2 3 4

5

A

M

N

G

R

S

T

V

Q

H

I

J

L

C

E

B

CONTACT SIDE

NON-CONTACT

SIDE

A

A

Silicon grease
(GEM1057)

Silicon adhesive
(GYA1011)

1/2

×

5

×

7

×

5

×

4

×

15

×

4

×

6

×

5

×

34

×

4

×

6

×

2

×

5

×

2

×

4

×

2

×

3

×

5

×

2

×

10

×

14

×

5

×

5

×

4

6 7 8

A

B

C

D

E

5

VSX-820-K

6 7 8

F

67

1

2 3 4

EXTERIOR SECTION (VSX-820-K) PARTS LIST

Mark No. Description Part No.

1 INPUT Assy 7028069131010-IL

A

2 AMP Assy 7028067523010-IL
3 SPEAKER Assy 7028069151010-IL
4 HEADPHONE Assy 7028069114010-IL
5 MIC Assy 7028069116010-IL

Mark

No. Description Par t No.

46 Cover 4317215111000-IL
47 Clamp MTG 4330000310000-IL
48 Clamp 4330040343010-IL
49 Stopper 4380040162010-IL
50 Window Display 5077212953010-IL

6 PT Assy 7028069112010-IL
7 HP_GUIDE Assy 7028069115010-IL
8 CNT1 Assy 7028069119010-IL
9 CNT2 Assy 7028069113010-IL

10 GUIDE_L Assy 7028069117010-IL

B

11 GUIDE_R Assy 7028069118010-IL
12 VIDEO Assy 7028069141010-IL
13 F-VIDEO Assy 7028069123010-IL
14 FRONT Assy 7028069121010-IL
15 FUNCTION Assy 7028069122010-IL

16 MAIN Assy 7028069111010-IL
17 REG Assy 7028069162010-IL
18 HDMI Assy 7028069191010-IL
19 DSP Assy 7028069161010-IL

C

20 USB Assy 7028069171010-IL

21 BT Assy 7028069181010-IL

> 22 Power Trans. 8200960610590-IL
> 23 Transistor (Q2071-Q2075) J5011560Y0000-IL
> 24 Semi, Tr/Ge NPN 2SC J502396400010-IL

(Q2051-Q2055)

> 25 Transistor (Q2011-Q2015) J5032390Y0000-IL

51 Knob 5080212361000-IL
52 Button 5090213741100-IL
53 Button 5 Key 5090214311000-IL
54 Button 10 Key 5090214321000-IL
55 Label Trans 5507000003270-IL

56 • • • • •
57 • • • • •
58 • • • • •
59 Screw 1500001456010-IL
60 Screw BBT30P100FTB

61 Screw BBT40P080FTB
62 Screw BBZ30P080FTB
63 Screw BBZ30P080FTC
64 Screw BBZ30P180FTC
65 Screw BMZ30P100FTB

66 Screw Tapping Assy B018230141H11-IL
67 Screw, Tap Tite B020930083B10-IL

rew B028940101B11-IL

68 Sc

> 26 Cord Assy L068125101710-IL

27 Cable, Flat Card 1.25 N712232533810-IL

D

28 Pioneer Badge B (PLS) XAM3006
29 Sheet 1210210235000-IL
30 Sheet 1210210762000-IL

31 Plate 4470211956000-IL
32 Sheet 1217211152000-IL

NSP 33 Heatsink 2120211378000-IL

34 Cabinet

3007211276200-IL

35 Panel Front 3067214861000-IL

36 Shield 3070210626000-IL

E

NSP 37 Chassis 3200212676000-IL

38 Chassis Back 3207213456000-IL
39 Foot 4007210391000-IL
40 Bracket 4010056906010-IL

41 Cushion 4050211365000-IL
42 Cushion 4050211385000-IL
43 Cushion 4050211605000-IL
44 Cushion 4050211745000-IL
45 Spacer 4300040561010-IL

F

68

VSX-820-K

1

2 3 4

5

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

69

1

O

F

O

P

K

D

1/2

Nut

Nut

×

6

×

2

×

5

×

5

×

14

×

2

2/2

×

3

×

6

2 3 4

9.3 EXTERIOR SECTION (VSX-520-K)

A

B

C

D

E

F

70

VSX-820-K

1

2 3 4

5

A

B

M

F

G

R

S

T

V

Q

H

I

J

L

C

Silicon grease
(GEM1057)

Silicon adhesive
(GYA1011)

A

A

CONTACT SIDE

NON-CONTACT

SIDE

1/2

×

5

×

7

×

5

×

4

×

15

×

4

×

6

×

4

×

34

×

4

×

4

×

6

×

4

×

2

×

2

×

3

×

5

×

2

×

10

×

14

×

5

×

5

6 7 8

A

B

C

D

E

VSX-820-K

5

6 7 8

F

71

1

2 3 4

EXTERIOR SECTION (VSX-520-K) PARTS LIST

Mark No. Description Part No.

1 INPUT Assy 7028069131020-IL

A

2 AMP Assy 7028067523010-IL
3 SPEAKER Assy 7028069151030-IL
4 HEADPHONE Assy 7028069114010-IL
5 PORTABLE Assy 702806911A010-IL

No. Description Par t No.

Mark

46 • • • • •
47 Clamp MTG 4330000310000-IL
48 Clamp 4330040343010-IL
49 Stopper 4380040162010-IL
50 Window Display 5077212953000-IL

6 PT Assy 7028069112010-IL
7 HP_GUIDE Assy 7028069115010-IL
8 CNT1 Assy 7028069119010-IL
9 CNT2 Assy 7028069113010-IL

10 GUIDE_L Assy 7028069117010-IL

B

11 GUIDE_R Assy 7028069118010-IL
12 VIDEO Assy 7028069141040-IL
13 • • • • •
14 FRONT Assy 7028069121020-IL
15 FUNCTION Assy 7028069122010-IL

16 MAIN Assy 7028069111060-IL
17 REG Assy 7028069162010-IL
18 HDMI Assy 7028069191020-IL
19 DSP Assy 7028069161020-IL

C

20 • • • • •

21 BT Assy 7028069181010-IL

> 22 Power Trans. 8200960610470-IL
> 23 Transistor (Q2071-Q2075) J5011560Y0000-IL
> 24 Semi, Tr/Ge NPN 2SC J502396400010-IL

(Q2051-Q2055)

> 25 Transistor (Q2011-Q2015) J5032390Y0000-IL

51 Knob 5080212361000-IL
52 Button 5090213741100-IL
53 Button 5 Key 5090214311000-IL
54 Button 10 Key 5090214321000-IL
55 Label Trans 5507000003270-IL

56 • • • • •
57 • • • • •
58 • • • • •
59 Screw 1500001456010-IL
60 Screw BBT30P100FTB

61 Screw BBT40P080FTB
62 Screw BBZ30P080FTB
63 Screw BBZ30P080FTC
64 Screw BBZ30P180FTC
65 • • • • •

66 Screw Tapping Assy B018230141H11-IL
67 Screw, Tap Tite B020930083B10-IL
68 Screw B028940101B11-IL

> 26 Cord Assy L068125101710-IL
NSP 27 Cable, Flat Card 1.25 N712192533810-IL

D

28 Pioneer Badge B (PLS) XAM3006
29 Sheet 1210210235000-IL
30 Sheet 1210210772000-IL

31 • • • • •
32 • • • • •

NSP 33 Heatsink 2120211378000-IL

34 Cabinet 3007211276200-IL
35 Panel Front 30672148

• • • • •

E

36

NSP 37 Chassis 3200212676000-IL

38 Chassis Back 3207213446000-IL
39 Foot (PLS) 4000210391000-IL
40 Bracket 4010056906010-IL

41 Cushion 4050211365000-IL
42 Cushion 4050211385000-IL
43 Cushion 4050211605000-IL
44 Cushion 4050211745000-IL
45 Spacer 4300040561010-IL

F

51000-IL

72

VSX-820-K

1

2 3 4

5

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

73

1

A

V

CP502

Q

CP118

Q

CP117

VSX-820-K ONLY

VSX-820-K ONLY

(SW)(SW)

(SW)

(SW)

(SW)

(SW)

2 3 4

10. SCHEMATIC DIAGRAM

10.1 INPUT ASSY

A

B

C

D

E

F

74

1

VSX-820-K

2 3 4

5

A

A

INPUT ASSY
(7028069131010-IL: VSX-820-K)
(7028069131020-IL: VSX-520-K)

B

CN201

The > mark found on some component parts
indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts
of identical designation.

N

CN701

E

CN707

F

CN703

Q

CP120

I

CN121B

VSX-820-K ONLY

VSX-820-K ONLY

VSX-520-K ONLY

VSX-520-K ONLY

CP802(VSX-820-K)

CP802(VSX-520-K)

: Audio Signal Route (Front L ch)

(FL)

: Audio Signal Route (Surround L ch)

(SL)

: Audio Signal Route (Center ch)

(C)

: Audio Signal Route (Subwoofer ch)

(SW)

(FL)

(FL)

(SL)

(SL)

(SW)

(SW)

(SW)(SW)

(C)

(C)

6 7 8

A

B

C

D

VSX-820-K

5

6 7 8

E

F

75

1

B

B

AMP ASSY (7028067523010-IL)

A

CP801

IDLE
CURRENT

IDLE
CURRENT

: Audio Signal Route (Front L ch)

(FL)

(SL)

(SL)

(SL)

(FL) (FL)

(FL)

(C) (C) (C)

: Audio Signal Route (Surround L ch)

(SL)

: Audio Signal Route (Center ch)

(C)

10.2 AMP ASSY

A

2 3 4

B

C

D

E

F

76

1

VSX-820-K

2 3 4

5

B

The > mark found on some component parts
indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts
of identical designation.

C

CN401

Q

CP107

IDLE
CURRENT

IDLE
CURRENT

IDLE
CURRENT

(SL)

(SL)

(FL)

(FL)

(FL)

(C)

(C) (C)

(C)

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

77

1

4

1
2

1

NO.

NM

NM

NM

NM

NO.

3

5

JACK402

J416
J417

CP405

Ref. NO.

PUSH 4P

VSX-520

Ref. NO.

JACK401

JACK403

OTHER

PUSH 2P

JUMPER

JUMPER

5267-02A

VSX-820

SCREW 8P

SCREW 2P

SCREW 4P

820CUXCNSM

2. VSX-820/520 DESTINATION OPTION TABLE

1. SET OPTION TABLE

D

HEADPHONE ASSY
(7028069114010-IL)

C

SPEAKER ASSY

(7028069151010-IL: VSX-820-K) (7028069151030-IL: VSX-520-K)

E

MIC ASSY (7028069116010-IL)

B

CP203

Q

CN104

Q

CN103

Q

CN106

A

CP802

The > mark found on some component parts
indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts
of identical designation.

C D E

VSX-820-K
ONLY

VSX-820-K ONLY

: Audio Signal Route (Front L ch)

(FL)

: Audio Signal Route (Headphone L ch)

(C)

(SL)

(FL)

(C)(C)

(SL)

(SL)

(SL)

(FL)

(FL)

(FL)

: Audio Signal Route (Surround L ch)

(SL)

: Audio Signal Route (Center ch)

(C)

2 3 4

10.3 SPEAKER, HEADPHONE and MIC ASSYS

A

B

C

D

E

F

78

VSX-820-K

1

2 3 4

5

6 7 8

10.4

PORTABLE, PT, HP_GUIDE, CNT1, CNT2, GUIDE_L and GUIDE_R ASSYS

CP802

A

PORTABLE ASSY

F

(702806911A010-IL)

PT ASSY (7028069112010-IL)

G

H

CP128

Q

VSX-520-K
ONLY

HP_GUIDE ASSY
(7028069115010-IL)

A

B

Q

CP121

Q

CP125

CP126

Q

CNT1 ASSY

I

(7028069119010-IL)

CP805

A

CNT2 ASSY

J

(7028069113010-IL)

CP703

S

C

D

E

GUIDE_L ASSY

K

(7028069117010-IL)

GUIDE_R ASSY

L

(7028069118010-IL)

F

LKJIHGF

VSX-820-K

5

6 7 8

79

1

IN2

IN1

H

L

+5V

L

L

L

L

L

OSD

L/H

L

L

L

H

COMP_SW2

CVBS_A

CVBS_C

-5V

H

H

COMPONENT

INPUT

MONITO

(BU4

L

SW2SW1

NJM2586M

INH

OSD

CVB

COMP_SW1

COMP_MUTE

CVBS_B

CVBS_MUTE

IN

FUNC

CONTRO

M

M

VIDEO ASSY
(7028069141010-IL: VSX-820-K)
(7028069141040-IL: VSX-520-K)

Q

CP122

VSX-820-K
ONLY

VSX-520-K
ONLY

VSX-820-K
ONLY

R1058
330(VSX-820-K)
0(VSX-520-K)

(Y)

(Y)

(Y)

(Cb)

(Cb)

(Cb)

(Cr)

(Cr)

(Cr)

10.5 VIDEO ASSY

A

B

2 3 4

C

D

E

F

80

VSX-820-K

1

2 3 4

L

L

L

L

L

H H

41

39

37

35

34

33

31

27

25

23

21
22

19

17

15

13

11

8

6

5

3

1

560

10

2K2

200

1/50

330

NM

330

NM

NM

NM

560

10

2K2

200

1/50

330

NM

330

NM

NM

NM

560

10

2K2

200

330

NM

330

L

L

L

H

L OUT L

40

38

36

32

26

28

30

29

18

20

24

9

10

12

14

16

7

4

2

No.

NM

330

NM

NM

NM

330

NM

NM

NM

330

NM

NM

VGND

OSD_DATA

INPUT

MONITOR

Y7

Y2

Y1

Y0

(BU4051BCF)

MUTE

DVR-RE

C

-

DVD

R1029

R1027

R1026

J1059

C1012

R1019

C1023
Q1011

C1015

R1024

C1014

R1040

C1041

R1028

Q1006

Q1007

REF. No.

0-3216 0- 3216

100/10 100/10

24P-1608

JUMPER

ISA1530AC1

18P-1608

0-3216 0-3216

0-1608 0-1608

33uH 33uH

JUMPER

330-1608

14M318(18P)

820 NA/JP

(NTSC)

0-3216

100/10

24P-1608

JUMPER

ISA1530AC1

18P-1608

1/50
0-3216

0-1608

33uH

JUMPER

330-1608

RT1P141C

RT1N430C

17M734(18P)

14M318(18P)

820-GENERAL

(NTSC / PAL SELECT)

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM
NM

NM

NM

NM

NM

1/50

NM

NM

NM

NM

NM

NM

520

INH

OSD

Y6

Y5

Y4

Y3

X

OUTPUT

CVBS INPUT SW

CONTROL-C

-

-

BD

X

Q1005

C1042

C1020

R1013

C1025

IC1002

C1011

R1041

C1046

J1028

Q1008

J1005

J1001

2SC3052

10P-D 10P-D

100P-J 100P-J

270P-J 270P-J

10N-1608

0-1608 0-1608

1M-1608

470-1608

470/6.3 470/6.3

LC74781

15P-1608

JUMPER

100/10 100/10

0-1608

0-1608

2SC3052

10P-D

100P-J

270P-J

10N-1608

0-1608

1M-1608

470-1608

470/6.3

LC74781

15P-1608

JUMPER

100/10

0-3216

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

10K-1608

NM

JUMPER

NM

NM

NM

VIDEO

OSD_CLK

OSD_CE

H H H

L H H

REC MUTE

L H L

TV/SAT

H L L

L L L

VIDEO

INPUT

* MODEL OPTION

J1062,J1015

C1017,C1019

24P-1608

J1024,J1033 JUMPER

J1014,J1042

ISA1530AC1

18P-1608

J1010,J1026

L1001(AXIAL)

JUMPERJ1021(AXIAL)

R1025(AXIAL)

330-1608

R1057(AXIAL)

XTAL1002 17M734(18P)

XTAL1001

MODEL

820 EUROPE

(PAL)

H L H

L L H

H H L

DVR/VCR

X X X

A B C

FUNCTION

CONTROL-A

2SC3052

C1024,C1030

C1013,C1022 10N-1608

1M-1608

R1015,R1017 470-1608

J1016,J1017

LC74781

J1012,J1031

15P-1608

JUMPER

R1058(AXIAL)

R1039(AXIAL)

* VSX-820 AREA OPTION

* OPTION TABLE (PCB BASIS)

ZD1001

5.6V

M

Q

CP123

VSX820-K ONLY

: Video Signal Route
: Video Signal Route (Y)

(Y)

: Video Signal Route (Cb)

(Cb)

: Video Signal Route (Cb)

(Cr)

5

6 7 8

A

B

C

D

E

F

5

6 7 8

VSX-820-K

81

1

N O P

N

F-VIDEO ASSY (7028069123010-IL)

P

FUNCTION ASSY
(7028069122010-IL)

O

FRONT ASSY
(7028069121010-IL:
VSX-820-K)
(7028069121020-IL:
VSX-520-K)

Q

FPC10

A

CP804

Q

CP110

The > mark found on some component parts
indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts
of identical designation.

VSX-820-K ONLY

: Video Signal Route

: Audio Signal Route

2 3 4

10.6 F-VIDEO, FRONT and FUNCTION ASSYS

A

B

C

D

E

F

82

VSX-820-K

1

2 3 4

5

O

U

CP802

Q

FPC101

VSX-820-K
ONLY

VSX-820-K
ONLY

23P: VSX-820-K
19P: VSX-520-K

6 7 8

A

B

C

D

E

5

VSX-820-K

6 7 8

F

83

1

KDS4148U

KDS4148U

Q R

The > mark found on some component parts
indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts
of identical designation.

Q

MAIN ASSY
(7028069111010-IL:
VSX-820-K)
(7028069111060-IL:
VSX-520-K)

R

REG ASSY
(7028069162010-IL)

H

CN601

G

CN201

G

CN202

B

CN202

C

CP403

C

CP405

I

CN121A

N

CN701

M

CN1001

M

CN1002

C

CP402

VSX-820-K
ONLY

VSX-820-K
ONLY

OUT

IN

GND

: Video Signal Route

• NOTE FOR FUSE REPLACEMENT

CAUTION -

FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,

REPLACE WITH SAME TYPE AND RATINGS OF FUSE.

10.7 MAIN and REG ASSYS

A

B

2 3 4

C

D

E

F

84

1

VSX-820-K

2 3 4

Q

S

CN701

S

CN702

A

CN807

A

CN803

A

CN806

V

CP501

O

CP704

U

CN807

T

2/2

CN204

T

1/2

CN203

T

1/2

CN202

VSX-820-K
ONLY

VSX-820-K

VSX-520-K

VSX-820-K ONLY

VSX-820-K
ONLY

VSX-820-K
ONLY

VSX-820-K

ONLY

R145
47k: VSX-820-K
OPEN: VSX-520-K

R146
OPEN: VSX-820-K
47k: VSX-520-K

FROM HEATSINK

REG ASSY
KIA7805API

T

2/2

CN200

5

6 7 8

A

B

C

D

5

VSX-820-K

6 7 8

E

F

85

1

HDMI Receiver IC

S

Q

CP111

VSX-820-K
ONLY

VSX-820-K
ONLY

10.8 HDMI ASSY

A

B

2 3 4

C

D

E

F

86

1

2 3 4

VSX-820-K

5

HDMI Transmitter

S

Q

CP112

J

CN703A

S

HDMI ASSY
(7028069191010-IL: VSX-820-K)
(7028069191020-IL: VSX-520-K)

The > mark found on some component parts
indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts
of identical designation.

6 7 8

A

B

C

D

E

F

5

6 7 8

VSX-820-K

87

1

The > mark found on some component parts
indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts
of identical designation.

Q

CP114

T

1/2

DSP ASSY
(7028069161010-IL: VSX-820-K)
(7028069161020-IL: VSX-520-K)

T

1/2

: Audio Signal Route (Front L ch)

(FL)

(FL)

(SL)

(C)

(SW)

(SBL)

: Audio Signal Route (Surround L ch)

(SL)

: Audio Signal Route (Center ch)

(C)

: Audio Signal Route (Subwoofer ch)

(SW)

: Audio Signal Route (Surround Back L ch)

(SBL)

10.9 DSP ASSY (1/2)

A

B

2 3 4

C

D

E

F

88

VSX-820-K

1

2 3 4

5

T 2/2

Q

CP1154

T

1/2

VSX-820-K
ONLY

(C)

(SW)

(SBL)

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

89

1

Q

CP116

Q

CP200

T

2/2

T 1/2

T

2/2

DSP ASSY
(7028069161010-IL: VSX-820-K)
(7028069161020-IL: VSX-520-K)

VSX-820-K
ONLY

10.10 DSP ASSY (2/2)

A

B

2 3 4

C

D

E

F

90

VSX-820-K

1

2 3 4

5

T

2/2

The > mark found on some component parts
indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts
of identical designation.

U

CN805

VSX-820-K

ONLY

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

91

1

U

U

USB ASSY (7028069171010-IL)

The > mark found on some component parts
indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts
of identical designation.

T

2/2

CP105

2 3 4

10.11 USB ASSY (VSX-820-K ONLY)

A

B

C

D

E

F

92

1

2 3 4

VSX-820-K

5

U

O

CN802

Q

CP105

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

93

1

V

V

BT ASSY (7028069181010-IL)

A

CN502

Q

CN501

10.12 BT ASSY

A

B

2 3 4

C

D

E

F

94

1

2 3 4

VSX-820-K

5

NOTE FOR PCB DIAGRAMS :

1. The parts mounted on this PCB include all
necessary parts for several destinations.
For further information for respective desti­nations, be sure to check with the sche­matic diagram.

CapacitorConnector

P.C.Board Chip Part

SIDE A

SIDE B

2. View point of PCB diagrams.

6 7 8

11. PCB CONNECTION DIAGRAM

A

B

C

D

E

F

VSX-820-K

5

6 7 8

95

1

A

SIDE A SIDE A

E

CN707 (VSX-820-K)

E

CN703 (VSX-520-K)

N

CN701

CP804

V

CP502

CN502

CP802

B

CN201

CP801

Q

CP117

CN807

Q

CP118

CN803

Q

CP120

CN806

I

CN121B

CP805

IC803Q816

Q815

Q817
Q818

IC804

A

INPUT ASSY

VSX-820-K

Only

2 3 4

11.1 INPUT ASSY

A

B

C

D

E

F

96

1

2 3 4

VSX-820-K

5

6 7 8

SIDE B SIDE B

INPUT ASSY

A

CN807CN803CN806 CP805 CP804

A

B

CN502

C

D

E

CP802 CP801

Q822 Q827 Q813
Q821

Q823 Q824
Q820

Q835
Q836

Q819

Q812 Q814 Q806 Q808 Q805 Q801 Q803 Q811

Q825Q831
Q826Q832

Q829Q833

Q828Q830Q834

IC801

Q810

Q802
Q804
Q807
Q809

VSX-820-K

5

6 7 8

Q837

IC802

Q813 Q813

F

A

97

11.2 AMP ASSY

B

SIDE A

SIDE B

B

AMP ASSY

B

AMP ASSY

CN201

Q

CP107

A

CP801

CN202

C

CN401

CP203

CN201

CN202 CP203

VR

VR201C

VR201SL

VR201SR

VR201FR

VR201FL

Q

Q205FLQ205SL

Q207SLQ207FL

Q207SLQ207FL

Q207FR

Q201FRQ201C

Q201FLQ201SR

Q205C

Q201SL

Q205SR

Q205FR

Q202FR

Q206FL

Q202FL

Q206SL

Q206FRQ202SR

Q202SLQ203SR

Q203FL

Q206SRQ204FL

Q204FRQ203FR

Q204SL

Q203SL

Q204SR

Q204C

Q206C

Q202C

A

1

2 3 4

B

C

D

E

F

98

VSX-820-K

1

2 3 4

B

SIDE A

SIDE B

CN401

CP203

CP203

5

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

99

1

C D E F

C

SPEAKER ASSY

D

HEADPHONE ASSY

SIDE A SIDE A

Q

CN104

CP403

Q

CN103

CP402

Q

CN106

CP405

B

CP203

CN401

CN702

CP404

E

MIC ASSY

A

CP802

VSX-820-K Only

VSX-520-K Only

CN707

F

PORTABLE ASSY

A

CP802

CN703

VSX-820-K

Only

2 3 4

11.3 SPEAKER, HEADPHONE, MIC and PORTABLE ASSYS

A

B

C

D

E

F

100

1

VSX-820-K

2 3 4